20200111021221 has 16 divisors (see below), whose sum is σ = 28351142312640. Its totient is φ = 12757915670400.

The previous prime is 20200111021201. The next prime is 20200111021241. The reversal of 20200111021221 is 12212011100202.

It is an interprime number because it is at equal distance from previous prime (20200111021201) and next prime (20200111021241).

It is not a de Polignac number, because 20200111021221 - 2⁶ = 20200111021157 is a prime.

It is a super-2 number, since 2×20200111021221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20200111021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200111021201) 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, 19329921 + ... + 20348121.

It is an arithmetic number, because the mean of its divisors is an integer number (1771946394540).

Almost surely, 2^{20200111021221} is an apocalyptic number.

It is an amenable number.

20200111021221 is a deficient number, since it is larger than the sum of its proper divisors (8151031291419).

20200111021221 is a wasteful number, since it uses less digits than its factorization.

20200111021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366276.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20200111021221 its reverse (12212011100202), we get a palindrome (32412122121423).

The spelling of 20200111021221 in words is "twenty trillion, two hundred billion, one hundred eleven million, twenty-one thousand, two hundred twenty-one".