22102002001221 has 16 divisors (see below), whose sum is σ = 30420421943808. Its totient is φ = 14259139473600.

The previous prime is 22102002001147. The next prime is 22102002001229. The reversal of 22102002001221 is 12210020020122.

It is a de Polignac number, because none of the positive numbers 2^k-22102002001221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22102002001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102002001229) 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, 4464735 + ... + 8008611.

It is an arithmetic number, because the mean of its divisors is an integer number (1901276371488).

Almost surely, 2^{22102002001221} is an apocalyptic number.

It is an amenable number.

22102002001221 is a deficient number, since it is larger than the sum of its proper divisors (8318419942587).

22102002001221 is a wasteful number, since it uses less digits than its factorization.

22102002001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610972.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22102002001221 its reverse (12210020020122), we get a palindrome (34312022021343).

The spelling of 22102002001221 in words is "twenty-two trillion, one hundred two billion, two million, one thousand, two hundred twenty-one".