21122220101010 has 64 divisors (see below), whose sum is σ = 60984455040000. Its totient is φ = 4573834126272.

The previous prime is 21122220101009. The next prime is 21122220101039. The reversal of 21122220101010 is 1010102222112.

It is a super-2 number, since 2×21122220101010² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2646890760 + ... + 2646898739.

It is an arithmetic number, because the mean of its divisors is an integer number (952882110000).

Almost surely, 2^{21122220101010} is an apocalyptic number.

21122220101010 is an abundant number, since it is smaller than the sum of its proper divisors (39862234938990).

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

21122220101010 is a wasteful number, since it uses less digits than its factorization.

21122220101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5293789535.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122220101010 its reverse (1010102222112), we get a palindrome (22132322323122).

The spelling of 21122220101010 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, one hundred one thousand, ten".