121211011200 has 96 divisors (see below), whose sum is σ = 399238799760. Its totient is φ = 32322933760.

The previous prime is 121211011199. The next prime is 121211011219. The reversal of 121211011200 is 2110112121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×121211011200² (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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6303474 + ... + 6322673.

Almost surely, 2^121211011200 is an apocalyptic number.

121211011200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211011200 is an abundant number, since it is smaller than the sum of its proper divisors (278027788560).

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

121211011200 is a wasteful number, since it uses less digits than its factorization.

121211011200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626174 (or 12626157 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121211011200 its reverse (2110112121), we get a palindrome (123321123321).

The spelling of 121211011200 in words is "one hundred twenty-one billion, two hundred eleven million, eleven thousand, two hundred".