1001020131 has 6 divisors (see below), whose sum is σ = 1445917980. Its totient is φ = 667346748.

The previous prime is 1001020127. The next prime is 1001020151. The reversal of 1001020131 is 1310201001.

It is not a de Polignac number, because 1001020131 - 2² = 1001020127 is a prime.

It is a super-2 number, since 2×1001020131² = 2004082605334514322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 111224459 = 1001020131 / (1 + 0 + 0 + 1 + 0 + 2 + 0 + 1 + 3 + 1).

It is not an unprimeable number, because it can be changed into a prime (1001020151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55612221 + ... + 55612238.

It is an arithmetic number, because the mean of its divisors is an integer number (240986330).

Almost surely, 2^1001020131 is an apocalyptic number.

1001020131 is a deficient number, since it is larger than the sum of its proper divisors (444897849).

1001020131 is a wasteful number, since it uses less digits than its factorization.

1001020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111224465 (or 111224462 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1001020131 is about 31638.9021775409. The cubic root of 1001020131 is about 1000.3399281025.

Adding to 1001020131 its reverse (1310201001), we get a palindrome (2311221132).

The spelling of 1001020131 in words is "one billion, one million, twenty thousand, one hundred thirty-one".