121423401204 has 144 divisors (see below), whose sum is σ = 357081455808. Its totient is φ = 31892216832.

The previous prime is 121423401173. The next prime is 121423401217. The reversal of 121423401204 is 402104324121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288582 + ... + 571074.

It is an arithmetic number, because the mean of its divisors is an integer number (2479732332).

Almost surely, 2^121423401204 is an apocalyptic number.

121423401204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121423401204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178540727904).

121423401204 is an abundant number, since it is smaller than the sum of its proper divisors (235658054604).

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

121423401204 is a wasteful number, since it uses less digits than its factorization.

121423401204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282574 (or 282565 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 121423401204 its reverse (402104324121), we get a palindrome (523527725325).

The spelling of 121423401204 in words is "one hundred twenty-one billion, four hundred twenty-three million, four hundred one thousand, two hundred four".