121010401421 has 48 divisors (see below), whose sum is σ = 155147287680. Its totient is φ = 93526151040.

The previous prime is 121010401399. The next prime is 121010401429. The reversal of 121010401421 is 124104010121.

It is not a de Polignac number, because 121010401421 - 2²⁶ = 120943292557 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121010401421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010401429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4917470 + ... + 4942016.

It is an arithmetic number, because the mean of its divisors is an integer number (3232235160).

Almost surely, 2^121010401421 is an apocalyptic number.

It is an amenable number.

121010401421 is a deficient number, since it is larger than the sum of its proper divisors (34136886259).

121010401421 is a wasteful number, since it uses less digits than its factorization.

121010401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24754 (or 24747 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121010401421 its reverse (124104010121), we get a palindrome (245114411542).

The spelling of 121010401421 in words is "one hundred twenty-one billion, ten million, four hundred one thousand, four hundred twenty-one".