20101202221 has 8 divisors (see below), whose sum is σ = 20369924064. Its totient is φ = 19833978000.

The previous prime is 20101202207. The next prime is 20101202227. The reversal of 20101202221 is 12220210102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20101202221 - 2⁹ = 20101201709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101202227) 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, 347370 + ... + 401083.

It is an arithmetic number, because the mean of its divisors is an integer number (2546240508).

Almost surely, 2^20101202221 is an apocalyptic number.

It is an amenable number.

20101202221 is a deficient number, since it is larger than the sum of its proper divisors (268721843).

20101202221 is a wasteful number, since it uses less digits than its factorization.

20101202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748811.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20101202221 its reverse (12220210102), we get a palindrome (32321412323).

The spelling of 20101202221 in words is "twenty billion, one hundred one million, two hundred two thousand, two hundred twenty-one".