121212111960 has 128 divisors (see below), whose sum is σ = 425305728000. Its totient is φ = 30622002048.

The previous prime is 121212111959. The next prime is 121212111967. The reversal of 121212111960 is 69111212121.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212111967) 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, 2932992 + ... + 2974031.

It is an arithmetic number, because the mean of its divisors is an integer number (3322701000).

Almost surely, 2^121212111960 is an apocalyptic number.

121212111960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212111960 is an abundant number, since it is smaller than the sum of its proper divisors (304093616040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121212111960 is a wasteful number, since it uses less digits than its factorization.

121212111960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907062 (or 5907052 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The spelling of 121212111960 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, nine hundred sixty".