121540225001 has 6 divisors (see below), whose sum is σ = 131608646190. Its totient is φ = 112190976768.

The previous prime is 121540224973. The next prime is 121540225021. The reversal of 121540225001 is 100522045121.

It can be written as a sum of positive squares in 3 ways, for example, as 4630938601 + 116909286400 = 68051^2 + 341920^2 .

It is not a de Polignac number, because 121540225001 - 2¹⁴ = 121540208617 is a prime.

It is a super-3 number, since 3×121540225001³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121540225021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 359586296 + ... + 359586633.

It is an arithmetic number, because the mean of its divisors is an integer number (21934774365).

Almost surely, 2^121540225001 is an apocalyptic number.

It is an amenable number.

121540225001 is a deficient number, since it is larger than the sum of its proper divisors (10068421189).

121540225001 is an equidigital number, since it uses as much as digits as its factorization.

121540225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719172955 (or 719172942 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 121540225001 in words is "one hundred twenty-one billion, five hundred forty million, two hundred twenty-five thousand, one".