21122011101021 has 32 divisors (see below), whose sum is σ = 28294256352768. Its totient is φ = 14015722291200.

The previous prime is 21122011100999. The next prime is 21122011101091. The reversal of 21122011101021 is 12010111022112.

It is a happy number.

It is not a de Polignac number, because 21122011101021 - 2¹⁰ = 21122011099997 is a prime.

It is a super-2 number, since 2×21122011101021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122011101091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2075460285 + ... + 2075470461.

It is an arithmetic number, because the mean of its divisors is an integer number (884195511024).

Almost surely, 2^{21122011101021} is an apocalyptic number.

It is an amenable number.

21122011101021 is a deficient number, since it is larger than the sum of its proper divisors (7172245251747).

21122011101021 is a wasteful number, since it uses less digits than its factorization.

21122011101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14021.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21122011101021 its reverse (12010111022112), we get a palindrome (33132122123133).

The spelling of 21122011101021 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, one hundred one thousand, twenty-one".