21201211102010 has 8 divisors (see below), whose sum is σ = 38162179983636. Its totient is φ = 8480484440800.

The previous prime is 21201211102007. The next prime is 21201211102067. The reversal of 21201211102010 is 1020111210212.

It can be written as a sum of positive squares in 2 ways, for example, as 18564611316889 + 2636599785121 = 4308667^2 + 1623761^2 .

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, 1060060555091 + ... + 1060060555110.

Almost surely, 2^{21201211102010} is an apocalyptic number.

21201211102010 is a deficient number, since it is larger than the sum of its proper divisors (16960968881626).

21201211102010 is a wasteful number, since it uses less digits than its factorization.

21201211102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120121110208.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201211102010 its reverse (1020111210212), we get a palindrome (22221322312222).

The spelling of 21201211102010 in words is "twenty-one trillion, two hundred one billion, two hundred eleven million, one hundred two thousand, ten".