2101125126451 has 16 divisors (see below), whose sum is σ = 2269836456160. Its totient is φ = 1933431171840.

The previous prime is 2101125126431. The next prime is 2101125126553. The reversal of 2101125126451 is 1546215211012.

It is a cyclic number.

It is not a de Polignac number, because 2101125126451 - 2⁷ = 2101125126323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101125126421) 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, 10011271 + ... + 10218991.

It is an arithmetic number, because the mean of its divisors is an integer number (141864778510).

Almost surely, 2^{2101125126451} is an apocalyptic number.

2101125126451 is a deficient number, since it is larger than the sum of its proper divisors (168711329709).

2101125126451 is a wasteful number, since it uses less digits than its factorization.

2101125126451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210166.

The product of its (nonzero) digits is 4800, while the sum is 31.

The spelling of 2101125126451 in words is "two trillion, one hundred one billion, one hundred twenty-five million, one hundred twenty-six thousand, four hundred fifty-one".