561214002021 has 4 divisors (see below), whose sum is σ = 748285336032. Its totient is φ = 374142668012.

The previous prime is 561214001951. The next prime is 561214002061. The reversal of 561214002021 is 120200412165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561214002021 - 2²⁶ = 561146893157 is a prime.

It is a super-2 number, since 2×561214002021² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 561214001982 and 561214002000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561214002061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93535667001 + ... + 93535667006.

It is an arithmetic number, because the mean of its divisors is an integer number (187071334008).

Almost surely, 2^561214002021 is an apocalyptic number.

It is an amenable number.

561214002021 is a deficient number, since it is larger than the sum of its proper divisors (187071334011).

561214002021 is a wasteful number, since it uses less digits than its factorization.

561214002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187071334010.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 561214002021 its reverse (120200412165), we get a palindrome (681414414186).

The spelling of 561214002021 in words is "five hundred sixty-one billion, two hundred fourteen million, two thousand, twenty-one".