20100010100220 has 72 divisors (see below), whose sum is σ = 61008209362464. Its totient is φ = 5356646322048.

The previous prime is 20100010100087. The next prime is 20100010100263. The reversal of 20100010100220 is 2200101000102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34673944 + ... + 35248863.

Almost surely, 2^{20100010100220} is an apocalyptic number.

20100010100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100010100220 is an abundant number, since it is smaller than the sum of its proper divisors (40908199262244).

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

20100010100220 is a wasteful number, since it uses less digits than its factorization.

20100010100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69924419 (or 69924414 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100010100220 its reverse (2200101000102), we get a palindrome (22300111100322).

The spelling of 20100010100220 in words is "twenty trillion, one hundred billion, ten million, one hundred thousand, two hundred twenty".