621046226421 has 12 divisors (see below), whose sum is σ = 910455828672. Its totient is φ = 407851252776.

The previous prime is 621046226407. The next prime is 621046226431. The reversal of 621046226421 is 124622640126.

621046226421 is a `hidden beast` number, since 6 + 2 + 1 + 0 + 4 + 6 + 2 + 2 + 642 + 1 = 666.

It is not a de Polignac number, because 621046226421 - 2²⁵ = 621012671989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621046226431) 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, 514963101 + ... + 514964306.

It is an arithmetic number, because the mean of its divisors is an integer number (75871319056).

Almost surely, 2^621046226421 is an apocalyptic number.

It is an amenable number.

621046226421 is a deficient number, since it is larger than the sum of its proper divisors (289409602251).

621046226421 is a wasteful number, since it uses less digits than its factorization.

621046226421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029927480 (or 1029927477 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Adding to 621046226421 its reverse (124622640126), we get a palindrome (745668866547).

The spelling of 621046226421 in words is "six hundred twenty-one billion, forty-six million, two hundred twenty-six thousand, four hundred twenty-one".