2121507150651 has 48 divisors (see below), whose sum is σ = 3658882795680. Its totient is φ = 1211371096320.

The previous prime is 2121507150601. The next prime is 2121507150673. The reversal of 2121507150651 is 1560517051212.

2121507150651 is a `hidden beast` number, since 21 + 2 + 15 + 0 + 71 + 506 + 51 = 666.

It is not a de Polignac number, because 2121507150651 - 2¹¹ = 2121507148603 is a prime.

It is a super-3 number, since 3×2121507150651³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121507150601) 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, 1140735 + ... + 2354631.

It is an arithmetic number, because the mean of its divisors is an integer number (76226724910).

Almost surely, 2^{2121507150651} is an apocalyptic number.

2121507150651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2121507150651 is a deficient number, since it is larger than the sum of its proper divisors (1537375645029).

2121507150651 is a wasteful number, since it uses less digits than its factorization.

2121507150651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215241 (or 1215228 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 36.

The spelling of 2121507150651 in words is "two trillion, one hundred twenty-one billion, five hundred seven million, one hundred fifty thousand, six hundred fifty-one".