21220040061398 has 32 divisors (see below), whose sum is σ = 33308481606624. Its totient is φ = 10128073393152.

The previous prime is 21220040061343. The next prime is 21220040061427. The reversal of 21220040061398 is 89316004002212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110924486 + ... + 111115622.

It is an arithmetic number, because the mean of its divisors is an integer number (1040890050207).

Almost surely, 2^{21220040061398} is an apocalyptic number.

21220040061398 is a deficient number, since it is larger than the sum of its proper divisors (12088441545226).

21220040061398 is a wasteful number, since it uses less digits than its factorization.

21220040061398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219536.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 21220040061398 in words is "twenty-one trillion, two hundred twenty billion, forty million, sixty-one thousand, three hundred ninety-eight".