21202211208 has 32 divisors (see below), whose sum is σ = 53903930400. Its totient is φ = 6947616768.

The previous prime is 21202211189. The next prime is 21202211243. The reversal of 21202211208 is 80211220212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7485241 + ... + 7488072.

It is an arithmetic number, because the mean of its divisors is an integer number (1684497825).

Almost surely, 2^21202211208 is an apocalyptic number.

It is an amenable number.

21202211208 is an abundant number, since it is smaller than the sum of its proper divisors (32701719192).

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

21202211208 is a wasteful number, since it uses less digits than its factorization.

21202211208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14973381 (or 14973377 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The spelling of 21202211208 in words is "twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred eight".