2151266155101 has 40 divisors (see below), whose sum is σ = 3866008815680. Its totient is φ = 1164595205952.

The previous prime is 2151266155091. The next prime is 2151266155109. The reversal of 2151266155101 is 1015516621512.

2151266155101 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 26 + 615 + 5 + 10 + 1 = 666.

It is not a de Polignac number, because 2151266155101 - 2²² = 2151261960797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151266155109) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99834496 + ... + 99856041.

It is an arithmetic number, because the mean of its divisors is an integer number (96650220392).

Almost surely, 2^{2151266155101} is an apocalyptic number.

2151266155101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2151266155101 is a deficient number, since it is larger than the sum of its proper divisors (1714742660579).

2151266155101 is a wasteful number, since it uses less digits than its factorization.

2151266155101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199690575 (or 199690566 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The spelling of 2151266155101 in words is "two trillion, one hundred fifty-one billion, two hundred sixty-six million, one hundred fifty-five thousand, one hundred one".