202021202121000 has 512 divisors, whose sum is σ = 688588488806400. Its totient is φ = 49153671705600.

The previous prime is 202021202120923. The next prime is 202021202121019. The reversal of 202021202121000 is 121202120202.

It is a super-2 number, since 2×202021202121000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 165474807 + ... + 166691193.

It is an arithmetic number, because the mean of its divisors is an integer number (1344899392200).

Almost surely, 2^{202021202121000} is an apocalyptic number.

202021202121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202021202121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344294244403200).

202021202121000 is an abundant number, since it is smaller than the sum of its proper divisors (486567286685400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202021202121000 is a wasteful number, since it uses less digits than its factorization.

202021202121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216546 (or 1216532 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202021202121000 its reverse (121202120202), we get a palindrome (202142404241202).

The spelling of 202021202121000 in words is "two hundred two trillion, twenty-one billion, two hundred two million, one hundred twenty-one thousand".