21970531099 has 8 divisors (see below), whose sum is σ = 23973583680. Its totient is φ = 19968433800.

The previous prime is 21970531091. The next prime is 21970531147. The reversal of 21970531099 is 99013507912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21970531099 - 2³ = 21970531091 is a prime.

It is a super-2 number, since 2×21970531099² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21970531091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190297 + ... + 283114.

It is an arithmetic number, because the mean of its divisors is an integer number (2996697960).

Almost surely, 2^21970531099 is an apocalyptic number.

21970531099 is a deficient number, since it is larger than the sum of its proper divisors (2003052581).

21970531099 is a wasteful number, since it uses less digits than its factorization.

21970531099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477641.

The product of its (nonzero) digits is 153090, while the sum is 46.

The spelling of 21970531099 in words is "twenty-one billion, nine hundred seventy million, five hundred thirty-one thousand, ninety-nine".