21162072211010 has 8 divisors (see below), whose sum is σ = 38091729979836. Its totient is φ = 8464828884400.

The previous prime is 21162072210977. The next prime is 21162072211061. The reversal of 21162072211010 is 1011227026112.

It can be written as a sum of positive squares in 2 ways, for example, as 21023903143489 + 138169067521 = 4585183^2 + 371711^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058103610541 + ... + 1058103610560.

Almost surely, 2^{21162072211010} is an apocalyptic number.

21162072211010 is a deficient number, since it is larger than the sum of its proper divisors (16929657768826).

21162072211010 is a wasteful number, since it uses less digits than its factorization.

21162072211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116207221108.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 21162072211010 its reverse (1011227026112), we get a palindrome (22173299237122).

The spelling of 21162072211010 in words is "twenty-one trillion, one hundred sixty-two billion, seventy-two million, two hundred eleven thousand, ten".