21122652206 has 4 divisors (see below), whose sum is σ = 31683978312. Its totient is φ = 10561326102.

The previous prime is 21122652119. The next prime is 21122652217. The reversal of 21122652206 is 60225622112.

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

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, 5280663050 + ... + 5280663053.

It is an arithmetic number, because the mean of its divisors is an integer number (7920994578).

Almost surely, 2^21122652206 is an apocalyptic number.

21122652206 is a deficient number, since it is larger than the sum of its proper divisors (10561326106).

21122652206 is a wasteful number, since it uses less digits than its factorization.

21122652206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561326105.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21122652206 in words is "twenty-one billion, one hundred twenty-two million, six hundred fifty-two thousand, two hundred six".