1031451021 has 12 divisors (see below), whose sum is σ = 1495542048. Its totient is φ = 685017864.

The previous prime is 1031451011. The next prime is 1031451041. The reversal of 1031451021 is 1201541301.

It is not a de Polignac number, because 1031451021 - 2⁹ = 1031450509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031450985 and 1031451003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031451011) 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, 215515 + ... + 220248.

It is an arithmetic number, because the mean of its divisors is an integer number (124628504).

Almost surely, 2^1031451021 is an apocalyptic number.

It is an amenable number.

1031451021 is a deficient number, since it is larger than the sum of its proper divisors (464091027).

1031451021 is a wasteful number, since it uses less digits than its factorization.

1031451021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436032 (or 436029 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1031451021 is about 32116.2111868757. The cubic root of 1031451021 is about 1010.3756472833.

Adding to 1031451021 its reverse (1201541301), we get a palindrome (2232992322).

The spelling of 1031451021 in words is "one billion, thirty-one million, four hundred fifty-one thousand, twenty-one".