1021197912 has 32 divisors (see below), whose sum is σ = 2917708800. Its totient is φ = 291770784.

The previous prime is 1021197829. The next prime is 1021197917. The reversal of 1021197912 is 2197911201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021197917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3039112 + ... + 3039447.

It is an arithmetic number, because the mean of its divisors is an integer number (91178400).

Almost surely, 2^1021197912 is an apocalyptic number.

1021197912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021197912 is an abundant number, since it is smaller than the sum of its proper divisors (1896510888).

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

1021197912 is a wasteful number, since it uses less digits than its factorization.

1021197912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078575 (or 6078571 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 33.

The square root of 1021197912 is about 31956.1873821018. The cubic root of 1021197912 is about 1007.0166225252.

The spelling of 1021197912 in words is "one billion, twenty-one million, one hundred ninety-seven thousand, nine hundred twelve".