121211013 has 32 divisors (see below), whose sum is σ = 212106240. Its totient is φ = 59650560.

The previous prime is 121210951. The next prime is 121211017. The reversal of 121211013 is 310112121.

It is not a de Polignac number, because 121211013 - 2⁶ = 121210949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121211013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211017) 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, 9420 + ... + 18197.

It is an arithmetic number, because the mean of its divisors is an integer number (6628320).

Almost surely, 2^121211013 is an apocalyptic number.

It is an amenable number.

121211013 is a deficient number, since it is larger than the sum of its proper divisors (90895227).

121211013 is a wasteful number, since it uses less digits than its factorization.

121211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27657.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121211013 is about 11009.5873219663. The cubic root of 121211013 is about 494.8960949137.

Adding to 121211013 its reverse (310112121), we get a palindrome (431323134).

The spelling of 121211013 in words is "one hundred twenty-one million, two hundred eleven thousand, thirteen".