121340400510 has 32 divisors (see below), whose sum is σ = 332819384832. Its totient is φ = 27734948640.

The previous prime is 121340400509. The next prime is 121340400527. The reversal of 121340400510 is 15004043121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288905506 + ... + 288905925.

It is an arithmetic number, because the mean of its divisors is an integer number (10400605776).

Almost surely, 2^121340400510 is an apocalyptic number.

121340400510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121340400510 is an abundant number, since it is smaller than the sum of its proper divisors (211478984322).

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

121340400510 is a wasteful number, since it uses less digits than its factorization.

121340400510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577811448.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 121340400510 its reverse (15004043121), we get a palindrome (136344443631).

The spelling of 121340400510 in words is "one hundred twenty-one billion, three hundred forty million, four hundred thousand, five hundred ten".