402021123311 has 8 divisors (see below), whose sum is σ = 406179510240. Its totient is φ = 397863019008.

The previous prime is 402021123299. The next prime is 402021123313. The reversal of 402021123311 is 113321120204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402021123311 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 (402021123313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3986270 + ... + 4085876.

It is an arithmetic number, because the mean of its divisors is an integer number (50772438780).

Almost surely, 2^402021123311 is an apocalyptic number.

402021123311 is a deficient number, since it is larger than the sum of its proper divisors (4158386929).

402021123311 is an equidigital number, since it uses as much as digits as its factorization.

402021123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141313.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 402021123311 its reverse (113321120204), we get a palindrome (515342243515).

The spelling of 402021123311 in words is "four hundred two billion, twenty-one million, one hundred twenty-three thousand, three hundred eleven".