21112211012010 has 32 divisors (see below), whose sum is σ = 51117707378880. Its totient is φ = 5580100608768.

The previous prime is 21112211011973. The next prime is 21112211012063. The reversal of 21112211012010 is 1021011221112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3113892040 + ... + 3113898819.

It is an arithmetic number, because the mean of its divisors is an integer number (1597428355590).

Almost surely, 2^{21112211012010} is an apocalyptic number.

21112211012010 is an abundant number, since it is smaller than the sum of its proper divisors (30005496366870).

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

21112211012010 is a wasteful number, since it uses less digits than its factorization.

21112211012010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6227790982.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112211012010 its reverse (1021011221112), we get a palindrome (22133222233122).

The spelling of 21112211012010 in words is "twenty-one trillion, one hundred twelve billion, two hundred eleven million, twelve thousand, ten".