2100022101221 has 8 divisors (see below), whose sum is σ = 2291004209088. Its totient is φ = 1909051828000.

The previous prime is 2100022101193. The next prime is 2100022101239. The reversal of 2100022101221 is 1221012200012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100022101221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100022101196 and 2100022101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100022101271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2585585 + ... + 3299286.

It is an arithmetic number, because the mean of its divisors is an integer number (286375526136).

Almost surely, 2^{2100022101221} is an apocalyptic number.

It is an amenable number.

2100022101221 is a deficient number, since it is larger than the sum of its proper divisors (190982107867).

2100022101221 is a wasteful number, since it uses less digits than its factorization.

2100022101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5917323.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100022101221 its reverse (1221012200012), we get a palindrome (3321034301233).

The spelling of 2100022101221 in words is "two trillion, one hundred billion, twenty-two million, one hundred one thousand, two hundred twenty-one".