137242121751 has 12 divisors (see below), whose sum is σ = 226558423312. Its totient is φ = 78424069536.

The previous prime is 137242121729. The next prime is 137242121761. The reversal of 137242121751 is 157121242731.

137242121751 is a `hidden beast` number, since 1 + 372 + 4 + 21 + 217 + 51 = 666.

It is not a de Polignac number, because 137242121751 - 2⁷ = 137242121623 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 (137242121701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1089223126 + ... + 1089223251.

Almost surely, 2^137242121751 is an apocalyptic number.

137242121751 is a deficient number, since it is larger than the sum of its proper divisors (89316301561).

137242121751 is a wasteful number, since it uses less digits than its factorization.

137242121751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178446390 (or 2178446387 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The spelling of 137242121751 in words is "one hundred thirty-seven billion, two hundred forty-two million, one hundred twenty-one thousand, seven hundred fifty-one".