121365028990 has 16 divisors (see below), whose sum is σ = 219797282448. Its totient is φ = 48248182656.

The previous prime is 121365028969. The next prime is 121365029011. The reversal of 121365028990 is 99820563121.

It is an interprime number because it is at equal distance from previous prime (121365028969) and next prime (121365029011).

It is a self number, because there is not a number n which added to its sum of digits gives 121365028990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37226907 + ... + 37230166.

It is an arithmetic number, because the mean of its divisors is an integer number (13737330153).

Almost surely, 2^121365028990 is an apocalyptic number.

121365028990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121365028990 is a deficient number, since it is larger than the sum of its proper divisors (98432253458).

121365028990 is a wasteful number, since it uses less digits than its factorization.

121365028990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74457243.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 121365028990 in words is "one hundred twenty-one billion, three hundred sixty-five million, twenty-eight thousand, nine hundred ninety".