123521420402 has 16 divisors (see below), whose sum is σ = 196698728160. Its totient is φ = 57974349888.

The previous prime is 123521420387. The next prime is 123521420413. The reversal of 123521420402 is 204024125321.

123521420402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4779968 + ... + 4805739.

It is an arithmetic number, because the mean of its divisors is an integer number (12293670510).

Almost surely, 2^123521420402 is an apocalyptic number.

123521420402 is a deficient number, since it is larger than the sum of its proper divisors (73177307758).

123521420402 is a wasteful number, since it uses less digits than its factorization.

123521420402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9586105.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 123521420402 its reverse (204024125321), we get a palindrome (327545545723).

The spelling of 123521420402 in words is "one hundred twenty-three billion, five hundred twenty-one million, four hundred twenty thousand, four hundred two".