121312030003021 has 16 divisors (see below), whose sum is σ = 142825609862208. Its totient is φ = 101582317036800.

The previous prime is 121312030003013. The next prime is 121312030003057. The reversal of 121312030003021 is 120300030213121.

It is a cyclic number.

It is not a de Polignac number, because 121312030003021 - 2³ = 121312030003013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121312030003021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312030003061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908215740 + ... + 908349301.

It is an arithmetic number, because the mean of its divisors is an integer number (8926600616388).

Almost surely, 2^{121312030003021} is an apocalyptic number.

121312030003021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121312030003021 is a deficient number, since it is larger than the sum of its proper divisors (21513579859187).

121312030003021 is a wasteful number, since it uses less digits than its factorization.

121312030003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816565532.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121312030003021 its reverse (120300030213121), we get a palindrome (241612060216142).

The spelling of 121312030003021 in words is "one hundred twenty-one trillion, three hundred twelve billion, thirty million, three thousand, twenty-one".