121731516057628 has 24 divisors (see below), whose sum is σ = 214607683447920. Its totient is φ = 60416171829120.

The previous prime is 121731516057617. The next prime is 121731516057637. The reversal of 121731516057628 is 826750615137121.

It is a super-2 number, since 2×121731516057628² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141665833 + ... + 142522528.

It is an arithmetic number, because the mean of its divisors is an integer number (8941986810330).

Almost surely, 2^{121731516057628} is an apocalyptic number.

It is an amenable number.

121731516057628 is a deficient number, since it is larger than the sum of its proper divisors (92876167390292).

121731516057628 is a wasteful number, since it uses less digits than its factorization.

121731516057628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284189157 (or 284189155 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 121731516057628 in words is "one hundred twenty-one trillion, seven hundred thirty-one billion, five hundred sixteen million, fifty-seven thousand, six hundred twenty-eight".