121211329658416 has 20 divisors (see below), whose sum is σ = 242945121945600. Its totient is φ = 58515814317632.

The previous prime is 121211329658411. The next prime is 121211329658429. The reversal of 121211329658416 is 614856923112121.

It is a super-2 number, since 2×121211329658416² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121211329658411) 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, 130615656496 + ... + 130615657423.

It is an arithmetic number, because the mean of its divisors is an integer number (12147256097280).

Almost surely, 2^{121211329658416} is an apocalyptic number.

121211329658416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121211329658416 is an abundant number, since it is smaller than the sum of its proper divisors (121733792287184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121211329658416 is a wasteful number, since it uses less digits than its factorization.

121211329658416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261231313956 (or 261231313950 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The spelling of 121211329658416 in words is "one hundred twenty-one trillion, two hundred eleven billion, three hundred twenty-nine million, six hundred fifty-eight thousand, four hundred sixteen".