121876651512 has 256 divisors, whose sum is σ = 423740851200. Its totient is φ = 31531991040.

The previous prime is 121876651469. The next prime is 121876651517. The reversal of 121876651512 is 215156678121.

121876651512 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 76 + 65 + 1 + 512 = 666.

It is a super-2 number, since 2×121876651512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121876651517) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4260168 + ... + 4288680.

It is an arithmetic number, because the mean of its divisors is an integer number (1655237700).

Almost surely, 2^121876651512 is an apocalyptic number.

121876651512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121876651512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211870425600).

121876651512 is an abundant number, since it is smaller than the sum of its proper divisors (301864199688).

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

121876651512 is a wasteful number, since it uses less digits than its factorization.

121876651512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28803 (or 28793 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The spelling of 121876651512 in words is "one hundred twenty-one billion, eight hundred seventy-six million, six hundred fifty-one thousand, five hundred twelve".