155245500121 has 16 divisors (see below), whose sum is σ = 157090147200. Its totient is φ = 153412771968.

The previous prime is 155245500101. The next prime is 155245500169. The reversal of 155245500121 is 121005542551.

It is a cyclic number.

It is not a de Polignac number, because 155245500121 - 2⁵ = 155245500089 is a prime.

It is a super-2 number, since 2×155245500121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155245500101) 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, 31622215 + ... + 31627123.

It is an arithmetic number, because the mean of its divisors is an integer number (9818134200).

Almost surely, 2^155245500121 is an apocalyptic number.

It is an amenable number.

155245500121 is a deficient number, since it is larger than the sum of its proper divisors (1844647079).

155245500121 is a wasteful number, since it uses less digits than its factorization.

155245500121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6048.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 155245500121 in words is "one hundred fifty-five billion, two hundred forty-five million, five hundred thousand, one hundred twenty-one".