20111002133100 has 72 divisors (see below), whose sum is σ = 58188476563728. Its totient is φ = 5362874572800.

The previous prime is 20111002133081. The next prime is 20111002133113. The reversal of 20111002133100 is 133120011102.

It is a happy number.

It is a super-2 number, since 2×20111002133100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20111002133100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31290172 + ... + 31926428.

Almost surely, 2^{20111002133100} is an apocalyptic number.

20111002133100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111002133100 is an abundant number, since it is smaller than the sum of its proper divisors (38077474430628).

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

20111002133100 is a wasteful number, since it uses less digits than its factorization.

20111002133100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741635 (or 741628 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20111002133100 its reverse (133120011102), we get a palindrome (20244122144202).

The spelling of 20111002133100 in words is "twenty trillion, one hundred eleven billion, two million, one hundred thirty-three thousand, one hundred".