1021001402 has 8 divisors (see below), whose sum is σ = 1621590516. Its totient is φ = 480471232.

The previous prime is 1021001389. The next prime is 1021001407. The reversal of 1021001402 is 2041001201.

It can be written as a sum of positive squares in 2 ways, for example, as 973377601 + 47623801 = 31199^2 + 6901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1021001402³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021001407) 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, 15014693 + ... + 15014760.

Almost surely, 2^1021001402 is an apocalyptic number.

1021001402 is a deficient number, since it is larger than the sum of its proper divisors (600589114).

1021001402 is a wasteful number, since it uses less digits than its factorization.

1021001402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30029472.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1021001402 is about 31953.1125557433. The cubic root of 1021001402 is about 1006.9520246875.

Adding to 1021001402 its reverse (2041001201), we get a palindrome (3062002603).

The spelling of 1021001402 in words is "one billion, twenty-one million, one thousand, four hundred two".