1210131021 has 16 divisors (see below), whose sum is σ = 1770373440. Its totient is φ = 729169920.

The previous prime is 1210130951. The next prime is 1210131049. The reversal of 1210131021 is 1201310121.

It is not a de Polignac number, because 1210131021 - 2¹¹ = 1210128973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210130988 and 1210131006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210130021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100276 + ... + 111693.

It is an arithmetic number, because the mean of its divisors is an integer number (110648340).

Almost surely, 2^1210131021 is an apocalyptic number.

1210131021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210131021 is a deficient number, since it is larger than the sum of its proper divisors (560242419).

1210131021 is a wasteful number, since it uses less digits than its factorization.

1210131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212156.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1210131021 is about 34786.9375053338. The cubic root of 1210131021 is about 1065.6406971610.

Adding to 1210131021 its reverse (1201310121), we get a palindrome (2411441142).

Subtracting from 1210131021 its reverse (1201310121), we obtain a square (8820900 = 2970²).

It can be divided in two parts, 1210 and 131021, that added together give a palindrome (132231).

The spelling of 1210131021 in words is "one billion, two hundred ten million, one hundred thirty-one thousand, twenty-one".