121211199982 has 4 divisors (see below), whose sum is σ = 181816799976. Its totient is φ = 60605599990.

The previous prime is 121211199961. The next prime is 121211199983. The reversal of 121211199982 is 289991112121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211199983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30302799994 + ... + 30302799997.

It is an arithmetic number, because the mean of its divisors is an integer number (45454199994).

Almost surely, 2^121211199982 is an apocalyptic number.

121211199982 is a deficient number, since it is larger than the sum of its proper divisors (60605599994).

121211199982 is an equidigital number, since it uses as much as digits as its factorization.

121211199982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60605599993.

The product of its digits is 46656, while the sum is 46.

The spelling of 121211199982 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred eighty-two".