1021211209983 has 24 divisors (see below), whose sum is σ = 1386876517120. Its totient is φ = 668299525920.

The previous prime is 1021211209957. The next prime is 1021211210017. The reversal of 1021211209983 is 3899021121201.

It is not a de Polignac number, because 1021211209983 - 2³⁰ = 1020137468159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021211209783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7021188 + ... + 7165158.

Almost surely, 2^{1021211209983} is an apocalyptic number.

1021211209983 is a deficient number, since it is larger than the sum of its proper divisors (365665307137).

1021211209983 is an equidigital number, since it uses as much as digits as its factorization.

1021211209983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144399 (or 144226 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The spelling of 1021211209983 in words is "one trillion, twenty-one billion, two hundred eleven million, two hundred nine thousand, nine hundred eighty-three".