21231330970 has 8 divisors (see below), whose sum is σ = 38216395764. Its totient is φ = 8492532384.

The previous prime is 21231330961. The next prime is 21231330971. The reversal of 21231330970 is 7903313212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18834543121 + 2396787849 = 137239^2 + 48957^2 .

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

It is a super-2 number, since 2×21231330970² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21231330971) 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 3 ways as a sum of consecutive naturals, for example, 1061566539 + ... + 1061566558.

Almost surely, 2^21231330970 is an apocalyptic number.

21231330970 is a deficient number, since it is larger than the sum of its proper divisors (16985064794).

21231330970 is a wasteful number, since it uses less digits than its factorization.

21231330970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123133104.

The product of its (nonzero) digits is 6804, while the sum is 31.

The spelling of 21231330970 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirty thousand, nine hundred seventy".