1222212810 has 128 divisors (see below), whose sum is σ = 3800401920. Its totient is φ = 244290816.

The previous prime is 1222212787. The next prime is 1222212833. The reversal of 1222212810 is 182122221.

1222212810 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1222212787) and next prime (1222212833).

It is a super-2 number, since 2×1222212810² = 2987608305856192200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40089 + ... + 63651.

It is an arithmetic number, because the mean of its divisors is an integer number (29690640).

Almost surely, 2^1222212810 is an apocalyptic number.

1222212810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222212810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1900200960).

1222212810 is an abundant number, since it is smaller than the sum of its proper divisors (2578189110).

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

1222212810 is a wasteful number, since it uses less digits than its factorization.

1222212810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23612.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1222212810 is about 34960.1603257193. The cubic root of 1222212810 is about 1069.1753654438.

The spelling of 1222212810 in words is "one billion, two hundred twenty-two million, two hundred twelve thousand, eight hundred ten".