121402400310 has 24 divisors (see below), whose sum is σ = 315646241040. Its totient is φ = 32373973392.

The previous prime is 121402400299. The next prime is 121402400311. The reversal of 121402400310 is 13004204121.

It is a super-2 number, since 2×121402400310² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121402400311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 674457690 + ... + 674457869.

It is an arithmetic number, because the mean of its divisors is an integer number (13151926710).

Almost surely, 2^121402400310 is an apocalyptic number.

121402400310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121402400310 is an abundant number, since it is smaller than the sum of its proper divisors (194243840730).

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

121402400310 is a wasteful number, since it uses less digits than its factorization.

121402400310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348915572 (or 1348915569 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121402400310 its reverse (13004204121), we get a palindrome (134406604431).

The spelling of 121402400310 in words is "one hundred twenty-one billion, four hundred two million, four hundred thousand, three hundred ten".