21101102021131 has 8 divisors (see below), whose sum is σ = 23554718535744. Its totient is φ = 18736707925320.

The previous prime is 21101102021071. The next prime is 21101102021173. The reversal of 21101102021131 is 13112020110112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21101102021131 - 2³⁵ = 21066742282763 is a prime.

It is a super-2 number, since 2×21101102021131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101102021431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22305604201 + ... + 22305605146.

It is an arithmetic number, because the mean of its divisors is an integer number (2944339816968).

Almost surely, 2^{21101102021131} is an apocalyptic number.

21101102021131 is a deficient number, since it is larger than the sum of its proper divisors (2453616514613).

21101102021131 is a wasteful number, since it uses less digits than its factorization.

21101102021131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44611209401.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21101102021131 its reverse (13112020110112), we get a palindrome (34213122131243).

The spelling of 21101102021131 in words is "twenty-one trillion, one hundred one billion, one hundred two million, twenty-one thousand, one hundred thirty-one".