1021023101231 has 4 divisors (see below), whose sum is σ = 1166883544272. Its totient is φ = 875162658192.

The previous prime is 1021023101209. The next prime is 1021023101251. The reversal of 1021023101231 is 1321013201201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021023101231 - 2³⁸ = 746145194287 is a prime.

It is a super-2 number, since 2×1021023101231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021023101251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72930221510 + ... + 72930221523.

It is an arithmetic number, because the mean of its divisors is an integer number (291720886068).

Almost surely, 2^{1021023101231} is an apocalyptic number.

1021023101231 is a deficient number, since it is larger than the sum of its proper divisors (145860443041).

1021023101231 is an equidigital number, since it uses as much as digits as its factorization.

1021023101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145860443040.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1021023101231 its reverse (1321013201201), we get a palindrome (2342036302432).

The spelling of 1021023101231 in words is "one trillion, twenty-one billion, twenty-three million, one hundred one thousand, two hundred thirty-one".