121434021502 has 16 divisors (see below), whose sum is σ = 182506562640. Its totient is φ = 60598543168.

The previous prime is 121434021493. The next prime is 121434021539. The reversal of 121434021502 is 205120434121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11006913 + ... + 11017939.

It is an arithmetic number, because the mean of its divisors is an integer number (11406660165).

Almost surely, 2^121434021502 is an apocalyptic number.

121434021502 is a deficient number, since it is larger than the sum of its proper divisors (61072541138).

121434021502 is a wasteful number, since it uses less digits than its factorization.

121434021502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21275.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 121434021502 its reverse (205120434121), we get a palindrome (326554455623).

The spelling of 121434021502 in words is "one hundred twenty-one billion, four hundred thirty-four million, twenty-one thousand, five hundred two".