402111101 has 12 divisors (see below), whose sum is σ = 468811548. Its totient is φ = 343893312.

The previous prime is 402111097. The next prime is 402111107. The reversal of 402111101 is 101111204.

It can be written as a sum of positive squares in 2 ways, for example, as 386908900 + 15202201 = 19670^2 + 3899^2 .

It is not a de Polignac number, because 402111101 - 2² = 402111097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402111107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13415 + ... + 31371.

It is an arithmetic number, because the mean of its divisors is an integer number (39067629).

Almost surely, 2^402111101 is an apocalyptic number.

It is an amenable number.

402111101 is a deficient number, since it is larger than the sum of its proper divisors (66700447).

402111101 is a wasteful number, since it uses less digits than its factorization.

402111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428 (or 18421 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 402111101 is about 20052.7080714800. The cubic root of 402111101 is about 738.1002530991.

Adding to 402111101 its reverse (101111204), we get a palindrome (503222305).

The spelling of 402111101 in words is "four hundred two million, one hundred eleven thousand, one hundred one".