121201103100 has 216 divisors, whose sum is σ = 445013267328. Its totient is φ = 25184611200.

The previous prime is 121201103087. The next prime is 121201103137. The reversal of 121201103100 is 1301102121.

It is a super-2 number, since 2×121201103100² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 213072 + ... + 536471.

It is an arithmetic number, because the mean of its divisors is an integer number (2060246608).

Almost surely, 2^121201103100 is an apocalyptic number.

121201103100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201103100 is an abundant number, since it is smaller than the sum of its proper divisors (323812164228).

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

121201103100 is a wasteful number, since it uses less digits than its factorization.

121201103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749585 (or 749571 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 121201103100 its reverse (1301102121), we get a palindrome (122502205221).

The spelling of 121201103100 in words is "one hundred twenty-one billion, two hundred one million, one hundred three thousand, one hundred".