122221201021 has 16 divisors (see below), whose sum is σ = 129928869504. Its totient is φ = 114572035584.

The previous prime is 122221201013. The next prime is 122221201043. The reversal of 122221201021 is 120102122221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122221201021 - 2³ = 122221201013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122221200986 and 122221201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221201051) 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, 4359976 + ... + 4387918.

It is an arithmetic number, because the mean of its divisors is an integer number (8120554344).

Almost surely, 2^122221201021 is an apocalyptic number.

It is an amenable number.

122221201021 is a deficient number, since it is larger than the sum of its proper divisors (7707668483).

122221201021 is a wasteful number, since it uses less digits than its factorization.

122221201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28980.

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

Adding to 122221201021 its reverse (120102122221), we get a palindrome (242323323242).

The spelling of 122221201021 in words is "one hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, twenty-one".