21121163062131 has 32 divisors (see below), whose sum is σ = 30871470719232. Its totient is φ = 12738360821760.

The previous prime is 21121163062099. The next prime is 21121163062177. The reversal of 21121163062131 is 13126036112112.

It is not a de Polignac number, because 21121163062131 - 2⁵ = 21121163062099 is a prime.

It is a super-2 number, since 2×21121163062131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121163062031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12451011 + ... + 14045283.

It is an arithmetic number, because the mean of its divisors is an integer number (964733459976).

Almost surely, 2^{21121163062131} is an apocalyptic number.

21121163062131 is a deficient number, since it is larger than the sum of its proper divisors (9750307657101).

21121163062131 is a wasteful number, since it uses less digits than its factorization.

21121163062131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596243.

The product of its (nonzero) digits is 2592, while the sum is 30.

Adding to 21121163062131 its reverse (13126036112112), we get a palindrome (34247199174243).

The spelling of 21121163062131 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred sixty-three million, sixty-two thousand, one hundred thirty-one".