2100022201221 has 16 divisors (see below), whose sum is σ = 3201548348544. Its totient is φ = 1199444742144.

The previous prime is 2100022201213. The next prime is 2100022201237. The reversal of 2100022201221 is 1221022200012.

It is not a de Polignac number, because 2100022201221 - 2³ = 2100022201213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100022201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100022201721) 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, 23618916 + ... + 23707661.

It is an arithmetic number, because the mean of its divisors is an integer number (200096771784).

Almost surely, 2^{2100022201221} is an apocalyptic number.

2100022201221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2100022201221 is a deficient number, since it is larger than the sum of its proper divisors (1101526147323).

2100022201221 is a wasteful number, since it uses less digits than its factorization.

2100022201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47328700.

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

Adding to 2100022201221 its reverse (1221022200012), we get a palindrome (3321044401233).

The spelling of 2100022201221 in words is "two trillion, one hundred billion, twenty-two million, two hundred one thousand, two hundred twenty-one".