1210000100220 has 72 divisors (see below), whose sum is σ = 3675221309760. Its totient is φ = 322237008000.

The previous prime is 1210000100191. The next prime is 1210000100249. The reversal of 1210000100220 is 220010000121.

It is an interprime number because it is at equal distance from previous prime (1210000100191) and next prime (1210000100249).

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, 4340335 + ... + 4610694.

Almost surely, 2^{1210000100220} is an apocalyptic number.

1210000100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210000100220 is an abundant number, since it is smaller than the sum of its proper divisors (2465221209540).

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

1210000100220 is a wasteful number, since it uses less digits than its factorization.

1210000100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8951795 (or 8951790 counting only the distinct ones).

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

Adding to 1210000100220 its reverse (220010000121), we get a palindrome (1430010100341).

The spelling of 1210000100220 in words is "one trillion, two hundred ten billion, one hundred thousand, two hundred twenty".