2111220810 has 48 divisors (see below), whose sum is σ = 5537777544. Its totient is φ = 558007296.

The previous prime is 2111220799. The next prime is 2111220823. The reversal of 2111220810 is 180221112.

It can be written as a sum of positive squares in 4 ways, for example, as 1476634329 + 634586481 = 38427^2 + 25191^2 .

It is a super-2 number, since 2×2111220810² = 8914506617154112200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 93627 + ... + 113966.

Almost surely, 2^2111220810 is an apocalyptic number.

2111220810 is an abundant number, since it is smaller than the sum of its proper divisors (3426556734).

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

2111220810 is a wasteful number, since it uses less digits than its factorization.

2111220810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207719 (or 207716 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 2111220810 is about 45948.0229172050. The cubic root of 2111220810 is about 1282.8559298459.

Adding to 2111220810 its reverse (180221112), we get a palindrome (2291441922).

The spelling of 2111220810 in words is "two billion, one hundred eleven million, two hundred twenty thousand, eight hundred ten".