22001211120021 has 16 divisors (see below), whose sum is σ = 35497752395904. Its totient is φ = 11832584131584.

The previous prime is 22001211120017. The next prime is 22001211120041. The reversal of 22001211120021 is 12002111210022.

It is not a de Polignac number, because 22001211120021 - 2² = 22001211120017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001211120041) 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, 30814020820 + ... + 30814021533.

It is an arithmetic number, because the mean of its divisors is an integer number (2218609524744).

Almost surely, 2^{22001211120021} is an apocalyptic number.

22001211120021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22001211120021 is a deficient number, since it is larger than the sum of its proper divisors (13496541275883).

22001211120021 is a wasteful number, since it uses less digits than its factorization.

22001211120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61628042380.

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

Adding to 22001211120021 its reverse (12002111210022), we get a palindrome (34003322330043).

Subtracting from 22001211120021 its reverse (12002111210022), we obtain a palindrome (9999099909999).

The spelling of 22001211120021 in words is "twenty-two trillion, one billion, two hundred eleven million, one hundred twenty thousand, twenty-one".