21160351621430 has 64 divisors (see below), whose sum is σ = 44091730944000. Its totient is φ = 7161378801408.

The previous prime is 21160351621429. The next prime is 21160351621471. The reversal of 21160351621430 is 3412615306112.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22087826 + ... + 23025914.

It is an arithmetic number, because the mean of its divisors is an integer number (688933296000).

Almost surely, 2^{21160351621430} is an apocalyptic number.

21160351621430 is an abundant number, since it is smaller than the sum of its proper divisors (22931379322570).

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

21160351621430 is a wasteful number, since it uses less digits than its factorization.

21160351621430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942261.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 21160351621430 its reverse (3412615306112), we get a palindrome (24572966927542).

The spelling of 21160351621430 in words is "twenty-one trillion, one hundred sixty billion, three hundred fifty-one million, six hundred twenty-one thousand, four hundred thirty".