215011131102 has 32 divisors (see below), whose sum is σ = 478559804160. Its totient is φ = 71556783480.

The previous prime is 215011131091. The next prime is 215011131113. The reversal of 215011131102 is 201131110512.

215011131102 is a `hidden beast` number, since 21 + 501 + 1 + 131 + 10 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (215011131091) and next prime (215011131113).

It is a super-2 number, since 2×215011131102² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3120988 + ... + 3189135.

It is an arithmetic number, because the mean of its divisors is an integer number (14954993880).

Almost surely, 2^215011131102 is an apocalyptic number.

215011131102 is an abundant number, since it is smaller than the sum of its proper divisors (263548673058).

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

215011131102 is a wasteful number, since it uses less digits than its factorization.

215011131102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310765 (or 6310759 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 215011131102 its reverse (201131110512), we get a palindrome (416142241614).

The spelling of 215011131102 in words is "two hundred fifteen billion, eleven million, one hundred thirty-one thousand, one hundred two".