22021210122121 has 16 divisors (see below), whose sum is σ = 26493258211200. Its totient is φ = 17880820530048.

The previous prime is 22021210122061. The next prime is 22021210122139. The reversal of 22021210122121 is 12122101212022.

It is not a de Polignac number, because 22021210122121 - 2⁴³ = 13225117099913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021210132121) 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 15 ways as a sum of consecutive naturals, for example, 2681020 + ... + 7157533.

It is an arithmetic number, because the mean of its divisors is an integer number (1655828638200).

Almost surely, 2^{22021210122121} is an apocalyptic number.

It is an amenable number.

22021210122121 is a deficient number, since it is larger than the sum of its proper divisors (4472048089079).

22021210122121 is a wasteful number, since it uses less digits than its factorization.

22021210122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9855408.

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

Adding to 22021210122121 its reverse (12122101212022), we get a palindrome (34143311334143).

The spelling of 22021210122121 in words is "twenty-two trillion, twenty-one billion, two hundred ten million, one hundred twenty-two thousand, one hundred twenty-one".