1011201131 has 4 divisors (see below), whose sum is σ = 1012884264. Its totient is φ = 1009518000.

The previous prime is 1011201119. The next prime is 1011201143. The reversal of 1011201131 is 1311021101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1311021101 = 13 ⋅100847777.

It is an interprime number because it is at equal distance from previous prime (1011201119) and next prime (1011201143).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011201131 is a prime.

It is a super-2 number, since 2×1011201131² = 2045055454671358322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011201181) 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, 840665 + ... + 841866.

It is an arithmetic number, because the mean of its divisors is an integer number (253221066).

Almost surely, 2^1011201131 is an apocalyptic number.

1011201131 is a deficient number, since it is larger than the sum of its proper divisors (1683133).

1011201131 is an equidigital number, since it uses as much as digits as its factorization.

1011201131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683132.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1011201131 is about 31799.3888463285. The cubic root of 1011201131 is about 1003.7198558482.

Adding to 1011201131 its reverse (1311021101), we get a palindrome (2322222232).

The spelling of 1011201131 in words is "one billion, eleven million, two hundred one thousand, one hundred thirty-one".