21001000212110 has 16 divisors (see below), whose sum is σ = 38680912019376. Its totient is φ = 8205041943168.

The previous prime is 21001000212107. The next prime is 21001000212167. The reversal of 21001000212110 is 1121200010012.

It is a junction number, because it is equal to n+sod(n) for n = 21001000212091 and 21001000212100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24419767259 + ... + 24419768118.

It is an arithmetic number, because the mean of its divisors is an integer number (2417557001211).

Almost surely, 2^{21001000212110} is an apocalyptic number.

21001000212110 is a deficient number, since it is larger than the sum of its proper divisors (17679911807266).

21001000212110 is a wasteful number, since it uses less digits than its factorization.

21001000212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48839535427.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21001000212110 its reverse (1121200010012), we get a palindrome (22122200222122).

The spelling of 21001000212110 in words is "twenty-one trillion, one billion, two hundred twelve thousand, one hundred ten".