121222010021 has 16 divisors (see below), whose sum is σ = 140003052288. Its totient is φ = 102808224000.

The previous prime is 121222010011. The next prime is 121222010027. The reversal of 121222010021 is 120010222121.

It is a cyclic number.

It is not a de Polignac number, because 121222010021 - 2²⁶ = 121154901157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222009978 and 121222010005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222010027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1035341 + ... + 1146461.

It is an arithmetic number, because the mean of its divisors is an integer number (8750190768).

Almost surely, 2^121222010021 is an apocalyptic number.

It is an amenable number.

121222010021 is a deficient number, since it is larger than the sum of its proper divisors (18781042267).

121222010021 is a wasteful number, since it uses less digits than its factorization.

121222010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112772.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121222010021 its reverse (120010222121), we get a palindrome (241232232142).

The spelling of 121222010021 in words is "one hundred twenty-one billion, two hundred twenty-two million, ten thousand, twenty-one".