1131021402 has 64 divisors (see below), whose sum is σ = 2746725120. Its totient is φ = 303561216.

The previous prime is 1131021349. The next prime is 1131021403. The reversal of 1131021402 is 2041201311.

1131021402 is a modest number, since divided by 21402 gives 11310 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1131021403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32518 + ... + 57614.

It is an arithmetic number, because the mean of its divisors is an integer number (42917580).

Almost surely, 2^1131021402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131021402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1373362560).

1131021402 is an abundant number, since it is smaller than the sum of its proper divisors (1615703718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131021402 is a wasteful number, since it uses less digits than its factorization.

1131021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25175.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1131021402 is about 33630.6616348831. The cubic root of 1131021402 is about 1041.8941694480.

Adding to 1131021402 its reverse (2041201311), we get a palindrome (3172222713).

The spelling of 1131021402 in words is "one billion, one hundred thirty-one million, twenty-one thousand, four hundred two".