1210100020220 has 72 divisors (see below), whose sum is σ = 3183493932864. Its totient is φ = 382976705664.

The previous prime is 1210100020183. The next prime is 1210100020229. The reversal of 1210100020220 is 220200010121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210100020229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47479412 + ... + 47504891.

It is an arithmetic number, because the mean of its divisors is an integer number (44215193512).

Almost surely, 2^{1210100020220} is an apocalyptic number.

1210100020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210100020220 is an abundant number, since it is smaller than the sum of its proper divisors (1973393912644).

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

1210100020220 is a wasteful number, since it uses less digits than its factorization.

1210100020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94984339 (or 94984330 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1210100020220 its reverse (220200010121), we get a palindrome (1430300030341).

The spelling of 1210100020220 in words is "one trillion, two hundred ten billion, one hundred million, twenty thousand, two hundred twenty".