121312303100 has 72 divisors (see below), whose sum is σ = 274541678208. Its totient is φ = 46475366400.

The previous prime is 121312303097. The next prime is 121312303111. The reversal of 121312303100 is 1303213121.

It is a super-2 number, since 2×121312303100² (a number of 23 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 23 ways as a sum of consecutive naturals, for example, 98984 + ... + 502416.

It is an arithmetic number, because the mean of its divisors is an integer number (3813078864).

Almost surely, 2^121312303100 is an apocalyptic number.

121312303100 is a gapful number since it is divisible by the number (10) 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 121312303100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137270839104).

121312303100 is an abundant number, since it is smaller than the sum of its proper divisors (153229375108).

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

121312303100 is a wasteful number, since it uses less digits than its factorization.

121312303100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403575 (or 403568 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 121312303100 its reverse (1303213121), we get a palindrome (122615516221).

The spelling of 121312303100 in words is "one hundred twenty-one billion, three hundred twelve million, three hundred three thousand, one hundred".