21311201121102 has 64 divisors (see below), whose sum is σ = 47583857617920. Its totient is φ = 7069917470400.

The previous prime is 21311201121097. The next prime is 21311201121107. The reversal of 21311201121102 is 20112110211312.

It is a happy number.

21311201121102 is a `hidden beast` number, since 21 + 311 + 201 + 121 + 10 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21311201121097) and next prime (21311201121107).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311201121107) 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, 26414827 + ... + 27209657.

It is an arithmetic number, because the mean of its divisors is an integer number (743497775280).

Almost surely, 2^{21311201121102} is an apocalyptic number.

21311201121102 is an abundant number, since it is smaller than the sum of its proper divisors (26272656496818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311201121102 is a wasteful number, since it uses less digits than its factorization.

21311201121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797206 (or 797200 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21311201121102 its reverse (20112110211312), we get a palindrome (41423311332414).

The spelling of 21311201121102 in words is "twenty-one trillion, three hundred eleven billion, two hundred one million, one hundred twenty-one thousand, one hundred two".