122100021020 has 24 divisors (see below), whose sum is σ = 256564299264. Its totient is φ = 48810626496.

The previous prime is 122100021019. The next prime is 122100021031. The reversal of 122100021020 is 20120001221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 122100020992 and 122100021010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1802279 + ... + 1868798.

It is an arithmetic number, because the mean of its divisors is an integer number (10690179136).

Almost surely, 2^122100021020 is an apocalyptic number.

122100021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122100021020 is an abundant number, since it is smaller than the sum of its proper divisors (134464278244).

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

122100021020 is a wasteful number, since it uses less digits than its factorization.

122100021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672749 (or 3672747 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 122100021020 its reverse (20120001221), we get a palindrome (142220022241).

The spelling of 122100021020 in words is "one hundred twenty-two billion, one hundred million, twenty-one thousand, twenty".