2221211201021 has 16 divisors (see below), whose sum is σ = 2355666027840. Its totient is φ = 2087180148480.

The previous prime is 2221211200951. The next prime is 2221211201087. The reversal of 2221211201021 is 1201021121222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221211201021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221211204021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36227531 + ... + 36288791.

It is an arithmetic number, because the mean of its divisors is an integer number (147229126740).

Almost surely, 2^{2221211201021} is an apocalyptic number.

It is an amenable number.

2221211201021 is a deficient number, since it is larger than the sum of its proper divisors (134454826819).

2221211201021 is a wasteful number, since it uses less digits than its factorization.

2221211201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64684.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221211201021 its reverse (1201021121222), we get a palindrome (3422232322243).

The spelling of 2221211201021 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred one thousand, twenty-one".