121338317380 has 24 divisors (see below), whose sum is σ = 291211962048. Its totient is φ = 41601708768.

The previous prime is 121338317357. The next prime is 121338317381. The reversal of 121338317380 is 83713833121.

It is a super-2 number, since 2×121338317380² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121338317381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433350994 + ... + 433351273.

It is an arithmetic number, because the mean of its divisors is an integer number (12133831752).

Almost surely, 2^121338317380 is an apocalyptic number.

121338317380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121338317380 is an abundant number, since it is smaller than the sum of its proper divisors (169873644668).

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

121338317380 is a wasteful number, since it uses less digits than its factorization.

121338317380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866702283 (or 866702281 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 121338317380 in words is "one hundred twenty-one billion, three hundred thirty-eight million, three hundred seventeen thousand, three hundred eighty".