2220212120021 has 24 divisors (see below), whose sum is σ = 2592238483296. Its totient is φ = 1896012891360.

The previous prime is 2220212119999. The next prime is 2220212120023. The reversal of 2220212120021 is 1200212120222.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2220212120021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220212120023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35786390 + ... + 35848376.

It is an arithmetic number, because the mean of its divisors is an integer number (108009936804).

Almost surely, 2^{2220212120021} is an apocalyptic number.

It is an amenable number.

2220212120021 is a deficient number, since it is larger than the sum of its proper divisors (372026363275).

2220212120021 is a wasteful number, since it uses less digits than its factorization.

2220212120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64689 (or 64682 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2220212120021 its reverse (1200212120222), we get a palindrome (3420424240243).

The spelling of 2220212120021 in words is "two trillion, two hundred twenty billion, two hundred twelve million, one hundred twenty thousand, twenty-one".