1022220100 has 54 divisors (see below), whose sum is σ = 2438235002. Its totient is φ = 371712000.

The previous prime is 1022220097. The next prime is 1022220103. The reversal of 1022220100 is 10222201.

It is an interprime number because it is at equal distance from previous prime (1022220097) and next prime (1022220103).

It can be written as a sum of positive squares in 3 ways, for example, as 1800964 + 1020419136 = 1342^2 + 31944^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1022220103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30141 + ... + 54340.

Almost surely, 2^1022220100 is an apocalyptic number.

1022220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022220100 is an abundant number, since it is smaller than the sum of its proper divisors (1416014902).

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

1022220100 is a wasteful number, since it uses less digits than its factorization.

1022220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84517 (or 84499 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1022220100 is about 31972.1769668567. The cubic root of 1022220100 is about 1007.3525081335.

Adding to 1022220100 its reverse (10222201), we get a palindrome (1032442301).

1022220100 divided by its reverse (10222201) gives a square (100 = 10²).

It can be divided in two parts, 1022 and 220100, that added together give a palindrome (221122).

The spelling of 1022220100 in words is "one billion, twenty-two million, two hundred twenty thousand, one hundred".