121312021021110 has 48 divisors (see below), whose sum is σ = 329124787471584. Its totient is φ = 30943356086016.

The previous prime is 121312021020977. The next prime is 121312021021189. The reversal of 121312021021110 is 11120120213121.

It is a happy number.

121312021021110 is a `hidden beast` number, since 1 + 213 + 1 + 20 + 210 + 211 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 29302418467 + ... + 29302422606.

It is an arithmetic number, because the mean of its divisors is an integer number (6856766405658).

Almost surely, 2^{121312021021110} is an apocalyptic number.

121312021021110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312021021110 is an abundant number, since it is smaller than the sum of its proper divisors (207812766450474).

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

121312021021110 is a wasteful number, since it uses less digits than its factorization.

121312021021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58604841109 (or 58604841106 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 121312021021110 its reverse (11120120213121), we get a palindrome (132432141234231).

The spelling of 121312021021110 in words is "one hundred twenty-one trillion, three hundred twelve billion, twenty-one million, twenty-one thousand, one hundred ten".