21000202120022 has 4 divisors (see below), whose sum is σ = 31500303180036. Its totient is φ = 10500101060010.

The previous prime is 21000202119977. The next prime is 21000202120031. The reversal of 21000202120022 is 22002120200012.

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 = 21000202119979 and 21000202120006.

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, 5250050530004 + ... + 5250050530007.

It is an arithmetic number, because the mean of its divisors is an integer number (7875075795009).

Almost surely, 2^{21000202120022} is an apocalyptic number.

21000202120022 is a deficient number, since it is larger than the sum of its proper divisors (10500101060014).

21000202120022 is a wasteful number, since it uses less digits than its factorization.

21000202120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500101060013.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21000202120022 its reverse (22002120200012), we get a palindrome (43002322320034).

The spelling of 21000202120022 in words is "twenty-one trillion, two hundred two million, one hundred twenty thousand, twenty-two".