1021121299 has 12 divisors (see below), whose sum is σ = 1137774568. Its totient is φ = 915567840.

The previous prime is 1021121293. The next prime is 1021121327. The reversal of 1021121299 is 9921211201.

It is not a de Polignac number, because 1021121299 - 2⁹ = 1021120787 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021121293) 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, 48969 + ... + 66634.

Almost surely, 2^1021121299 is an apocalyptic number.

1021121299 is a deficient number, since it is larger than the sum of its proper divisors (116653269).

1021121299 is a wasteful number, since it uses less digits than its factorization.

1021121299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115698 (or 115687 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 1021121299 is about 31954.9886402734. The cubic root of 1021121299 is about 1006.9914388682.

The spelling of 1021121299 in words is "one billion, twenty-one million, one hundred twenty-one thousand, two hundred ninety-nine".