20210221112102 has 32 divisors (see below), whose sum is σ = 36778402589760. Its totient is φ = 8131065569280.

The previous prime is 20210221112101. The next prime is 20210221112131. The reversal of 20210221112102 is 20121112201202.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210221112101) 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, 109055099 + ... + 109240262.

It is an arithmetic number, because the mean of its divisors is an integer number (1149325080930).

Almost surely, 2^{20210221112102} is an apocalyptic number.

20210221112102 is a deficient number, since it is larger than the sum of its proper divisors (16568181477658).

20210221112102 is a wasteful number, since it uses less digits than its factorization.

20210221112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218295776.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20210221112102 its reverse (20121112201202), we get a palindrome (40331333313304).

The spelling of 20210221112102 in words is "twenty trillion, two hundred ten billion, two hundred twenty-one million, one hundred twelve thousand, one hundred two".