2111551550001 has 16 divisors (see below), whose sum is σ = 3129304449600. Its totient is φ = 1407215064384.

The previous prime is 2111551549993. The next prime is 2111551550011. The reversal of 2111551550001 is 1000551551112.

It is a happy number.

2111551550001 is a `hidden beast` number, since 2 + 1 + 1 + 155 + 1 + 5 + 500 + 0 + 1 = 666.

It is not a de Polignac number, because 2111551550001 - 2³ = 2111551549993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2111551550011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13419471 + ... + 13575908.

It is an arithmetic number, because the mean of its divisors is an integer number (195581528100).

Almost surely, 2^{2111551550001} is an apocalyptic number.

It is an amenable number.

2111551550001 is a deficient number, since it is larger than the sum of its proper divisors (1017752899599).

2111551550001 is a wasteful number, since it uses less digits than its factorization.

2111551550001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26998285 (or 26998279 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 27.

The spelling of 2111551550001 in words is "two trillion, one hundred eleven billion, five hundred fifty-one million, five hundred fifty thousand, one".