121110021012 has 12 divisors (see below), whose sum is σ = 282590049056. Its totient is φ = 40370007000.

The previous prime is 121110020981. The next prime is 121110021037. The reversal of 121110021012 is 210120011121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 10092501751 = 121110021012 / (1 + 2 + 1 + 1 + 1 + 0 + 0 + 2 + 1 + 0 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5046250864 + ... + 5046250887.

Almost surely, 2^121110021012 is an apocalyptic number.

121110021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121110021012 is an abundant number, since it is smaller than the sum of its proper divisors (161480028044).

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

121110021012 is a wasteful number, since it uses less digits than its factorization.

121110021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092501758 (or 10092501756 counting only the distinct ones).

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

Adding to 121110021012 its reverse (210120011121), we get a palindrome (331230032133).

The spelling of 121110021012 in words is "one hundred twenty-one billion, one hundred ten million, twenty-one thousand, twelve".