1021400099 has 8 divisors (see below), whose sum is σ = 1043696448. Its totient is φ = 999127360.

The previous prime is 1021400063. The next prime is 1021400111. The reversal of 1021400099 is 9900041201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021400099 - 2⁸ = 1021399843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021400299) 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, 103229 + ... + 112689.

It is an arithmetic number, because the mean of its divisors is an integer number (130462056).

Almost surely, 2^1021400099 is an apocalyptic number.

1021400099 is a deficient number, since it is larger than the sum of its proper divisors (22296349).

1021400099 is an equidigital number, since it uses as much as digits as its factorization.

1021400099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11805.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1021400099 is about 31959.3507286991. The cubic root of 1021400099 is about 1007.0830778883.

The spelling of 1021400099 in words is "one billion, twenty-one million, four hundred thousand, ninety-nine".