21221341151430 has 64 divisors (see below), whose sum is σ = 58246252001280. Its totient is φ = 4847330193024.

The previous prime is 21221341151393. The next prime is 21221341151431. The reversal of 21221341151430 is 3415114312212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221341151431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33666885 + ... + 34291424.

It is an arithmetic number, because the mean of its divisors is an integer number (910097687520).

Almost surely, 2^{21221341151430} is an apocalyptic number.

21221341151430 is an abundant number, since it is smaller than the sum of its proper divisors (37024910849850).

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

21221341151430 is a wasteful number, since it uses less digits than its factorization.

21221341151430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67959813.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21221341151430 its reverse (3415114312212), we get a palindrome (24636455463642).

The spelling of 21221341151430 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred forty-one million, one hundred fifty-one thousand, four hundred thirty".