21221364231142 has 4 divisors (see below), whose sum is σ = 31832046346716. Its totient is φ = 10610682115570.

The previous prime is 21221364231139. The next prime is 21221364231167. The reversal of 21221364231142 is 24113246312212.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21221364231098 and 21221364231107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5305341057784 + ... + 5305341057787.

It is an arithmetic number, because the mean of its divisors is an integer number (7958011586679).

Almost surely, 2^{21221364231142} is an apocalyptic number.

21221364231142 is a deficient number, since it is larger than the sum of its proper divisors (10610682115574).

21221364231142 is a wasteful number, since it uses less digits than its factorization.

21221364231142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610682115573.

The product of its digits is 27648, while the sum is 34.

The spelling of 21221364231142 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred sixty-four million, two hundred thirty-one thousand, one hundred forty-two".