22021219971 has 12 divisors (see below), whose sum is σ = 31815453072. Its totient is φ = 14677571376.

The previous prime is 22021219951. The next prime is 22021219973. The reversal of 22021219971 is 17991212022.

It is a happy number.

It is not a de Polignac number, because 22021219971 - 2⁵ = 22021219939 is a prime.

It is a super-2 number, since 2×22021219971² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22021219973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226776 + ... + 308981.

It is an arithmetic number, because the mean of its divisors is an integer number (2651287756).

Almost surely, 2^22021219971 is an apocalyptic number.

22021219971 is a deficient number, since it is larger than the sum of its proper divisors (9794233101).

22021219971 is a wasteful number, since it uses less digits than its factorization.

22021219971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540330 (or 540327 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 22021219971 in words is "twenty-two billion, twenty-one million, two hundred nineteen thousand, nine hundred seventy-one".