20110212121986 has 96 divisors (see below), whose sum is σ = 51964302394368. Its totient is φ = 5495692894560.

The previous prime is 20110212121981. The next prime is 20110212122023. The reversal of 20110212121986 is 68912121201102.

It is a self number, because there is not a number n which added to its sum of digits gives 20110212121986.

It is not an unprimeable number, because it can be changed into a prime (20110212121981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 64025341 + ... + 64338671.

It is an arithmetic number, because the mean of its divisors is an integer number (541294816608).

Almost surely, 2^{20110212121986} is an apocalyptic number.

20110212121986 is an abundant number, since it is smaller than the sum of its proper divisors (31854090272382).

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

20110212121986 is a wasteful number, since it uses less digits than its factorization.

20110212121986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335516 (or 335513 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 20110212121986 in words is "twenty trillion, one hundred ten billion, two hundred twelve million, one hundred twenty-one thousand, nine hundred eighty-six".