122020221100021 has 16 divisors (see below), whose sum is σ = 122948046821376. Its totient is φ = 121095702000000.

The previous prime is 122020221100013. The next prime is 122020221100109. The reversal of 122020221100021 is 120001122020221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122020221100021 - 2³ = 122020221100013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122020221099968 and 122020221100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122020221104021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156408721 + ... + 157186921.

It is an arithmetic number, because the mean of its divisors is an integer number (7684252926336).

Almost surely, 2^{122020221100021} is an apocalyptic number.

It is an amenable number.

122020221100021 is a deficient number, since it is larger than the sum of its proper divisors (927825721355).

122020221100021 is a wasteful number, since it uses less digits than its factorization.

122020221100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780324.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122020221100021 its reverse (120001122020221), we get a palindrome (242021343120242).

The spelling of 122020221100021 in words is "one hundred twenty-two trillion, twenty billion, two hundred twenty-one million, one hundred thousand, twenty-one".