20002222212100 has 36 divisors (see below), whose sum is σ = 43406655616548. Its totient is φ = 8000550928000.

The previous prime is 20002222212083. The next prime is 20002222212143. The reversal of 20002222212100 is 121222220002.

It can be written as a sum of positive squares in 6 ways, for example, as 103467728896 + 19898754483204 = 321664^2 + 4460802^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1838491 + ... + 6586690.

It is an arithmetic number, because the mean of its divisors is an integer number (1205740433793).

Almost surely, 2^{20002222212100} is an apocalyptic number.

20002222212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002222212100 is an abundant number, since it is smaller than the sum of its proper divisors (23404433404448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002222212100 is a wasteful number, since it uses less digits than its factorization.

20002222212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448936 (or 8448929 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20002222212100 its reverse (121222220002), we get a palindrome (20123444432102).

The spelling of 20002222212100 in words is "twenty trillion, two billion, two hundred twenty-two million, two hundred twelve thousand, one hundred".