21122021210122 has 16 divisors (see below), whose sum is σ = 36216721340352. Its totient is φ = 9050409273600.

The previous prime is 21122021210111. The next prime is 21122021210197. The reversal of 21122021210122 is 22101212022112.

It is a super-2 number, since 2×21122021210122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122021210122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157057948 + ... + 157192375.

It is an arithmetic number, because the mean of its divisors is an integer number (2263545083772).

Almost surely, 2^{21122021210122} is an apocalyptic number.

21122021210122 is a deficient number, since it is larger than the sum of its proper divisors (15094700130230).

21122021210122 is a wasteful number, since it uses less digits than its factorization.

21122021210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314255133.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21122021210122 its reverse (22101212022112), we get a palindrome (43223233232234).

The spelling of 21122021210122 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, two hundred ten thousand, one hundred twenty-two".