22121111212001 has 4 divisors (see below), whose sum is σ = 22496045300400. Its totient is φ = 21746177123604.

The previous prime is 22121111211863. The next prime is 22121111212003. The reversal of 22121111212001 is 10021211112122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22121111212001 - 2¹⁰ = 22121111210977 is a prime.

It is a super-2 number, since 2×22121111212001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121111212003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187467044111 + ... + 187467044228.

It is an arithmetic number, because the mean of its divisors is an integer number (5624011325100).

Almost surely, 2^{22121111212001} is an apocalyptic number.

It is an amenable number.

22121111212001 is a deficient number, since it is larger than the sum of its proper divisors (374934088399).

22121111212001 is an equidigital number, since it uses as much as digits as its factorization.

22121111212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374934088398.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22121111212001 its reverse (10021211112122), we get a palindrome (32142322324123).

The spelling of 22121111212001 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, one".