121400311420 has 24 divisors (see below), whose sum is σ = 256801540464. Its totient is φ = 48205670016.

The previous prime is 121400311397. The next prime is 121400311429. The reversal of 121400311420 is 24113004121.

It is a super-2 number, since 2×121400311420² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121400311429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22150602 + ... + 22156081.

It is an arithmetic number, because the mean of its divisors is an integer number (10700064186).

Almost surely, 2^121400311420 is an apocalyptic number.

121400311420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121400311420 is an abundant number, since it is smaller than the sum of its proper divisors (135401229044).

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

121400311420 is a wasteful number, since it uses less digits than its factorization.

121400311420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44306829 (or 44306827 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121400311420 its reverse (24113004121), we get a palindrome (145513315541).

The spelling of 121400311420 in words is "one hundred twenty-one billion, four hundred million, three hundred eleven thousand, four hundred twenty".