211220001021012 has 12 divisors (see below), whose sum is σ = 492846669049056. Its totient is φ = 70406667007000.

The previous prime is 211220001020993. The next prime is 211220001021013. The reversal of 211220001021012 is 210120100022112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211220001021012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220001020982 and 211220001021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220001021013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8800833375864 + ... + 8800833375887.

It is an arithmetic number, because the mean of its divisors is an integer number (41070555754088).

Almost surely, 2^{211220001021012} is an apocalyptic number.

It is an amenable number.

211220001021012 is an abundant number, since it is smaller than the sum of its proper divisors (281626668028044).

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

211220001021012 is a wasteful number, since it uses less digits than its factorization.

211220001021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17601666751758 (or 17601666751756 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211220001021012 its reverse (210120100022112), we get a palindrome (421340101043124).

The spelling of 211220001021012 in words is "two hundred eleven trillion, two hundred twenty billion, one million, twenty-one thousand, twelve".