2400535232021 has 2 divisors, whose sum is σ = 2400535232022. Its totient is φ = 2400535232020.

The previous prime is 2400535231979. The next prime is 2400535232023. The reversal of 2400535232021 is 1202325350042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1735250309521 + 665284922500 = 1317289^2 + 815650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2400535232021 is a prime.

Together with 2400535232023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2400535232023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200267616010 + 1200267616011.

It is an arithmetic number, because the mean of its divisors is an integer number (1200267616011).

Almost surely, 2^{2400535232021} is an apocalyptic number.

It is an amenable number.

2400535232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2400535232021 is an equidigital number, since it uses as much as digits as its factorization.

2400535232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The spelling of 2400535232021 in words is "two trillion, four hundred billion, five hundred thirty-five million, two hundred thirty-two thousand, twenty-one".