20100202012221 has 16 divisors (see below), whose sum is σ = 27655049331648. Its totient is φ = 12976177536000.

The previous prime is 20100202012129. The next prime is 20100202012229. The reversal of 20100202012221 is 12221020200102.

It is not a de Polignac number, because 20100202012221 - 2¹⁵ = 20100201979453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20100202012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100202012229) 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, 429082980 + ... + 429129821.

It is an arithmetic number, because the mean of its divisors is an integer number (1728440583228).

Almost surely, 2^{20100202012221} is an apocalyptic number.

It is an amenable number.

20100202012221 is a deficient number, since it is larger than the sum of its proper divisors (7554847319427).

20100202012221 is a wasteful number, since it uses less digits than its factorization.

20100202012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858213052.

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

Adding to 20100202012221 its reverse (12221020200102), we get a palindrome (32321222212323).

The spelling of 20100202012221 in words is "twenty trillion, one hundred billion, two hundred two million, twelve thousand, two hundred twenty-one".