21112101201010 has 24 divisors (see below), whose sum is σ = 39357374882436. Its totient is φ = 8153639081280.

The previous prime is 21112101201007. The next prime is 21112101201043. The reversal of 21112101201010 is 1010210121112.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9531168133081 + 11580933067929 = 3087259^2 + 3403077^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1255170021 + ... + 1255186840.

Almost surely, 2^{21112101201010} is an apocalyptic number.

21112101201010 is a deficient number, since it is larger than the sum of its proper divisors (18245273681426).

21112101201010 is a wasteful number, since it uses less digits than its factorization.

21112101201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510356926 (or 2510356897 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21112101201010 its reverse (1010210121112), we get a palindrome (22122311322122).

The spelling of 21112101201010 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, two hundred one thousand, ten".