121221098031 has 64 divisors (see below), whose sum is σ = 185162858496. Its totient is φ = 69874627200.

The previous prime is 121221097997. The next prime is 121221098057. The reversal of 121221098031 is 130890122121.

It is not a de Polignac number, because 121221098031 - 2¹⁴ = 121221081647 is a prime.

It is a super-2 number, since 2×121221098031² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121221098031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221098231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16723450 + ... + 16730696.

It is an arithmetic number, because the mean of its divisors is an integer number (2893169664).

Almost surely, 2^121221098031 is an apocalyptic number.

121221098031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121221098031 is a deficient number, since it is larger than the sum of its proper divisors (63941760465).

121221098031 is a wasteful number, since it uses less digits than its factorization.

121221098031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7572.

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 121221098031 in words is "one hundred twenty-one billion, two hundred twenty-one million, ninety-eight thousand, thirty-one".