21012011100010 has 128 divisors (see below), whose sum is σ = 45068427952128. Its totient is φ = 6903828288000.

The previous prime is 21012011099999. The next prime is 21012011100089. The reversal of 21012011100010 is 1000111021012.

It is a super-2 number, since 2×21012011100010² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 21012011100010.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55031419 + ... + 55411921.

It is an arithmetic number, because the mean of its divisors is an integer number (352097093376).

Almost surely, 2^{21012011100010} is an apocalyptic number.

21012011100010 is an abundant number, since it is smaller than the sum of its proper divisors (24056416852118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012011100010 is a wasteful number, since it uses less digits than its factorization.

21012011100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380900.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21012011100010 its reverse (1000111021012), we get a palindrome (22012122121022).

The spelling of 21012011100010 in words is "twenty-one trillion, twelve billion, eleven million, one hundred thousand, ten".