121211199964 has 24 divisors (see below), whose sum is σ = 212560961760. Its totient is φ = 60479567616.

The previous prime is 121211199961. The next prime is 121211199983. The reversal of 121211199964 is 469991112121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211199961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9227169 + ... + 9240295.

It is an arithmetic number, because the mean of its divisors is an integer number (8856706740).

Almost surely, 2^121211199964 is an apocalyptic number.

It is an amenable number.

121211199964 is a deficient number, since it is larger than the sum of its proper divisors (91349761796).

121211199964 is a wasteful number, since it uses less digits than its factorization.

121211199964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17757 (or 17755 counting only the distinct ones).

The product of its digits is 69984, while the sum is 46.

The spelling of 121211199964 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred sixty-four".