21202012011022 has 4 divisors (see below), whose sum is σ = 31803018016536. Its totient is φ = 10601006005510.

The previous prime is 21202012010923. The next prime is 21202012011053. The reversal of 21202012011022 is 22011021020212.

It is a happy number.

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 = 21202012010987 and 21202012011005.

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, 5300503002754 + ... + 5300503002757.

It is an arithmetic number, because the mean of its divisors is an integer number (7950754504134).

Almost surely, 2^{21202012011022} is an apocalyptic number.

21202012011022 is a deficient number, since it is larger than the sum of its proper divisors (10601006005514).

21202012011022 is a wasteful number, since it uses less digits than its factorization.

21202012011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601006005513.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202012011022 its reverse (22011021020212), we get a palindrome (43213033031234).

The spelling of 21202012011022 in words is "twenty-one trillion, two hundred two billion, twelve million, eleven thousand, twenty-two".