2121501751101 has 36 divisors (see below), whose sum is σ = 3272297144064. Its totient is φ = 1324168732800.

The previous prime is 2121501751073. The next prime is 2121501751151. The reversal of 2121501751101 is 1011571051212.

2121501751101 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 501 + 7 + 51 + 101 = 666.

It is not a de Polignac number, because 2121501751101 - 2²² = 2121497556797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121501751151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1638415 + ... + 2631996.

Almost surely, 2^{2121501751101} is an apocalyptic number.

It is an amenable number.

2121501751101 is a deficient number, since it is larger than the sum of its proper divisors (1150795392963).

2121501751101 is a wasteful number, since it uses less digits than its factorization.

2121501751101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270642 (or 4270622 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 27.

The spelling of 2121501751101 in words is "two trillion, one hundred twenty-one billion, five hundred one million, seven hundred fifty-one thousand, one hundred one".