1021133402 has 4 divisors (see below), whose sum is σ = 1531700106. Its totient is φ = 510566700.

The previous prime is 1021133383. The next prime is 1021133419. The reversal of 1021133402 is 2043311201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 659411041 + 361722361 = 25679^2 + 19019^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255283349 + ... + 255283352.

Almost surely, 2^1021133402 is an apocalyptic number.

1021133402 is a deficient number, since it is larger than the sum of its proper divisors (510566704).

1021133402 is an equidigital number, since it uses as much as digits as its factorization.

1021133402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510566703.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1021133402 is about 31955.1780154641. The cubic root of 1021133402 is about 1006.9954173604.

Adding to 1021133402 its reverse (2043311201), we get a palindrome (3064444603).

The spelling of 1021133402 in words is "one billion, twenty-one million, one hundred thirty-three thousand, four hundred two".