21421141356 has 48 divisors (see below), whose sum is σ = 52168032000. Its totient is φ = 6828330432.

The previous prime is 21421141351. The next prime is 21421141457. The reversal of 21421141356 is 65314112412.

It is not an unprimeable number, because it can be changed into a prime (21421141351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1890195 + ... + 1901493.

It is an arithmetic number, because the mean of its divisors is an integer number (1086834000).

Almost surely, 2^21421141356 is an apocalyptic number.

It is an amenable number.

21421141356 is an abundant number, since it is smaller than the sum of its proper divisors (30746890644).

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

21421141356 is a wasteful number, since it uses less digits than its factorization.

21421141356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18198 (or 18196 counting only the distinct ones).

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

Adding to 21421141356 its reverse (65314112412), we get a palindrome (86735253768).

The spelling of 21421141356 in words is "twenty-one billion, four hundred twenty-one million, one hundred forty-one thousand, three hundred fifty-six".