10122212021 has 4 divisors (see below), whose sum is σ = 10222432044. Its totient is φ = 10021992000.

The previous prime is 10122212017. The next prime is 10122212033. The reversal of 10122212021 is 12021222101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8678971921 + 1443240100 = 93161^2 + 37990^2 .

It is a cyclic number.

It is not a de Polignac number, because 10122212021 - 2² = 10122212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10122211987 and 10122212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122212921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50109860 + ... + 50110061.

It is an arithmetic number, because the mean of its divisors is an integer number (2555608011).

Almost surely, 2^10122212021 is an apocalyptic number.

It is an amenable number.

10122212021 is a deficient number, since it is larger than the sum of its proper divisors (100220023).

10122212021 is a wasteful number, since it uses less digits than its factorization.

10122212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100220022.

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

Adding to 10122212021 its reverse (12021222101), we get a palindrome (22143434122).

The spelling of 10122212021 in words is "ten billion, one hundred twenty-two million, two hundred twelve thousand, twenty-one".