1021022100 has 216 divisors, whose sum is σ = 3743579840. Its totient is φ = 227888640.

The previous prime is 1021022083. The next prime is 1021022113. The reversal of 1021022100 is 12201201.

It is a super-2 number, since 2×1021022100² = 2084972257376820000, which contains 22 as substring.

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 71 ways as a sum of consecutive naturals, for example, 269016 + ... + 272784.

Almost surely, 2^1021022100 is an apocalyptic number.

1021022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021022100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871789920).

1021022100 is an abundant number, since it is smaller than the sum of its proper divisors (2722557740).

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

1021022100 is a wasteful number, since it uses less digits than its factorization.

1021022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839 (or 3829 counting only the distinct ones).

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

The square root of 1021022100 is about 31953.4364349126. The cubic root of 1021022100 is about 1006.9588290373.

Adding to 1021022100 its reverse (12201201), we get a palindrome (1033223301).

The spelling of 1021022100 in words is "one billion, twenty-one million, twenty-two thousand, one hundred".