121011220211100 has 36 divisors (see below), whose sum is σ = 350125797144984. Its totient is φ = 32269658722880.

The previous prime is 121011220211087. The next prime is 121011220211143. The reversal of 121011220211100 is 1112022110121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121011220211100.

It is a congruent number.

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, 201685366719 + ... + 201685367318.

Almost surely, 2^{121011220211100} is an apocalyptic number.

121011220211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011220211100 is an abundant number, since it is smaller than the sum of its proper divisors (229114576933884).

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

121011220211100 is a wasteful number, since it uses less digits than its factorization.

121011220211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403370734054 (or 403370734047 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121011220211100 its reverse (1112022110121), we get a palindrome (122123242321221).

The spelling of 121011220211100 in words is "one hundred twenty-one trillion, eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred".