21213545150402 has 48 divisors (see below), whose sum is σ = 35518718894400. Its totient is φ = 9493296304800.

The previous prime is 21213545150393. The next prime is 21213545150417. The reversal of 21213545150402 is 20405154531212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11311349 + ... + 13052727.

It is an arithmetic number, because the mean of its divisors is an integer number (739973310300).

Almost surely, 2^{21213545150402} is an apocalyptic number.

21213545150402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21213545150402 is a deficient number, since it is larger than the sum of its proper divisors (14305173743998).

21213545150402 is a wasteful number, since it uses less digits than its factorization.

21213545150402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742183 (or 1742172 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 21213545150402 its reverse (20405154531212), we get a palindrome (41618699681614).

The spelling of 21213545150402 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-five million, one hundred fifty thousand, four hundred two".