122000010021 has 12 divisors (see below), whose sum is σ = 185497091520. Its totient is φ = 77052637800.

The previous prime is 122000010017. The next prime is 122000010047. The reversal of 122000010021 is 120010000221.

It is not a de Polignac number, because 122000010021 - 2² = 122000010017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 122000009985 and 122000010012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122000010001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356725005 + ... + 356725346.

It is an arithmetic number, because the mean of its divisors is an integer number (15458090960).

Almost surely, 2^122000010021 is an apocalyptic number.

It is an amenable number.

122000010021 is a deficient number, since it is larger than the sum of its proper divisors (63497081499).

122000010021 is a wasteful number, since it uses less digits than its factorization.

122000010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713450376 (or 713450373 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 122000010021 its reverse (120010000221), we get a palindrome (242010010242).

The spelling of 122000010021 in words is "one hundred twenty-two billion, ten thousand, twenty-one".