21111102012010 has 32 divisors (see below), whose sum is σ = 39269037906432. Its totient is φ = 8163029413440.

The previous prime is 21111102011927. The next prime is 21111102012017. The reversal of 21111102012010 is 1021020111112.

It is a happy number.

It is a super-2 number, since 2×21111102012010² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111102012017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37260357 + ... + 37822696.

It is an arithmetic number, because the mean of its divisors is an integer number (1227157434576).

Almost surely, 2^{21111102012010} is an apocalyptic number.

21111102012010 is a deficient number, since it is larger than the sum of its proper divisors (18157935894422).

21111102012010 is a wasteful number, since it uses less digits than its factorization.

21111102012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75083998.

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

Adding to 21111102012010 its reverse (1021020111112), we get a palindrome (22132122123122).

The spelling of 21111102012010 in words is "twenty-one trillion, one hundred eleven billion, one hundred two million, twelve thousand, ten".