22021221111213 has 8 divisors (see below), whose sum is σ = 30044456710048. Its totient is φ = 14339399793264.

The previous prime is 22021221111209. The next prime is 22021221111247. The reversal of 22021221111213 is 31211112212022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22021221111213 - 2² = 22021221111209 is a prime.

It is a super-2 number, since 2×22021221111213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22021221111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021221111313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85353570070 + ... + 85353570327.

It is an arithmetic number, because the mean of its divisors is an integer number (3755557088756).

Almost surely, 2^{22021221111213} is an apocalyptic number.

It is an amenable number.

22021221111213 is a deficient number, since it is larger than the sum of its proper divisors (8023235598835).

22021221111213 is a wasteful number, since it uses less digits than its factorization.

22021221111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170707140443.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 22021221111213 its reverse (31211112212022), we get a palindrome (53232333323235).

The spelling of 22021221111213 in words is "twenty-two trillion, twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".