121901682731 has 4 divisors (see below), whose sum is σ = 121903062072. Its totient is φ = 121900303392.

The previous prime is 121901682713. The next prime is 121901682733. The reversal of 121901682731 is 137286109121.

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

It is a cyclic number.

It is not a de Polignac number, because 121901682731 - 2⁶ = 121901682667 is a prime.

It is a super-2 number, since 2×121901682731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121901682733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547310 + ... + 737123.

It is an arithmetic number, because the mean of its divisors is an integer number (30475765518).

Almost surely, 2^121901682731 is an apocalyptic number.

121901682731 is a deficient number, since it is larger than the sum of its proper divisors (1379341).

121901682731 is an equidigital number, since it uses as much as digits as its factorization.

121901682731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379340.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 121901682731 in words is "one hundred twenty-one billion, nine hundred one million, six hundred eighty-two thousand, seven hundred thirty-one".