20100022221 has 16 divisors (see below), whose sum is σ = 27509096448. Its totient is φ = 13049832000.

The previous prime is 20100022181. The next prime is 20100022231. The reversal of 20100022221 is 12222000102.

It is not a de Polignac number, because 20100022221 - 2⁹ = 20100021709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20100022197 and 20100022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100022231) 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, 525261 + ... + 562226.

It is an arithmetic number, because the mean of its divisors is an integer number (1719318528).

Almost surely, 2^20100022221 is an apocalyptic number.

It is an amenable number.

20100022221 is a deficient number, since it is larger than the sum of its proper divisors (7409074227).

20100022221 is a wasteful number, since it uses less digits than its factorization.

20100022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087652.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20100022221 its reverse (12222000102), we get a palindrome (32322022323).

The spelling of 20100022221 in words is "twenty billion, one hundred million, twenty-two thousand, two hundred twenty-one".