121025001455 has 16 divisors (see below), whose sum is σ = 156432881664. Its totient is φ = 89622999840.

The previous prime is 121025001451. The next prime is 121025001479. The reversal of 121025001455 is 554100520121.

It is not a de Polignac number, because 121025001455 - 2² = 121025001451 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 (121025001451) 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, 16970489 + ... + 16977618.

It is an arithmetic number, because the mean of its divisors is an integer number (9777055104).

Almost surely, 2^121025001455 is an apocalyptic number.

121025001455 is a deficient number, since it is larger than the sum of its proper divisors (35407880209).

121025001455 is a wasteful number, since it uses less digits than its factorization.

121025001455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33948166.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 121025001455 its reverse (554100520121), we get a palindrome (675125521576).

The spelling of 121025001455 in words is "one hundred twenty-one billion, twenty-five million, one thousand, four hundred fifty-five".