121021210313311 has 24 divisors (see below), whose sum is σ = 153711135996624. Its totient is φ = 94220452730880.

The previous prime is 121021210313279. The next prime is 121021210313327. The reversal of 121021210313311 is 113313012120121.

It is not a de Polignac number, because 121021210313311 - 2⁵ = 121021210313279 is a prime.

It is a super-2 number, since 2×121021210313311² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021210313611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96745900 + ... + 97988833.

It is an arithmetic number, because the mean of its divisors is an integer number (6404630666526).

Almost surely, 2^{121021210313311} is an apocalyptic number.

121021210313311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121021210313311 is a deficient number, since it is larger than the sum of its proper divisors (32689925683313).

121021210313311 is a wasteful number, since it uses less digits than its factorization.

121021210313311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194735911 (or 194735904 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 121021210313311 its reverse (113313012120121), we get a palindrome (234334222433432).

The spelling of 121021210313311 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred ten million, three hundred thirteen thousand, three hundred eleven".