1021099632 has 60 divisors (see below), whose sum is σ = 3068515656. Its totient is φ = 291742080.

The previous prime is 1021099627. The next prime is 1021099633. The reversal of 1021099632 is 2369901201.

It is a junction number, because it is equal to n+sod(n) for n = 1021099593 and 1021099602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021099633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214719 + ... + 219422.

Almost surely, 2^1021099632 is an apocalyptic number.

1021099632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021099632 is an abundant number, since it is smaller than the sum of its proper divisors (2047416024).

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

1021099632 is a wasteful number, since it uses less digits than its factorization.

1021099632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434166 (or 434153 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1021099632 is about 31954.6496147274. The cubic root of 1021099632 is about 1006.9843164242.

The spelling of 1021099632 in words is "one billion, twenty-one million, ninety-nine thousand, six hundred thirty-two".