2021110402 has 4 divisors (see below), whose sum is σ = 3031665606. Its totient is φ = 1010555200.

The previous prime is 2021110397. The next prime is 2021110411. The reversal of 2021110402 is 2040111202.

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: 2040111202 = 2 ⋅1020055601.

It can be written as a sum of positive squares in only one way, i.e., 1727981761 + 293128641 = 41569^2 + 17121^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505277599 + ... + 505277602.

Almost surely, 2^2021110402 is an apocalyptic number.

2021110402 is a deficient number, since it is larger than the sum of its proper divisors (1010555204).

2021110402 is a wasteful number, since it uses less digits than its factorization.

2021110402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010555203.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2021110402 is about 44956.7614714405. The cubic root of 2021110402 is about 1264.3384506172.

Adding to 2021110402 its reverse (2040111202), we get a palindrome (4061221604).

The spelling of 2021110402 in words is "two billion, twenty-one million, one hundred ten thousand, four hundred two".