121311513001 has 32 divisors (see below), whose sum is σ = 149361408000. Its totient is φ = 96156932352.

The previous prime is 121311512983. The next prime is 121311513019. The reversal of 121311513001 is 100315113121.

It is an interprime number because it is at equal distance from previous prime (121311512983) and next prime (121311513019).

It is not a de Polignac number, because 121311513001 - 2¹⁵ = 121311480233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121311513001.

It is not an unprimeable number, because it can be changed into a prime (121311513061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20631780 + ... + 20637658.

It is an arithmetic number, because the mean of its divisors is an integer number (4667544000).

Almost surely, 2^121311513001 is an apocalyptic number.

It is an amenable number.

121311513001 is a deficient number, since it is larger than the sum of its proper divisors (28049894999).

121311513001 is a wasteful number, since it uses less digits than its factorization.

121311513001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8901.

The product of its (nonzero) digits is 90, while the sum is 19.

Adding to 121311513001 its reverse (100315113121), we get a palindrome (221626626122).

The spelling of 121311513001 in words is "one hundred twenty-one billion, three hundred eleven million, five hundred thirteen thousand, one".