4021432099981 has 2 divisors, whose sum is σ = 4021432099982. Its totient is φ = 4021432099980.

The previous prime is 4021432099967. The next prime is 4021432100003. The reversal of 4021432099981 is 1899902341204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3544054744356 + 477377355625 = 1882566^2 + 690925^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021432099981 - 2¹⁷ = 4021431968909 is a prime.

It is a super-2 number, since 2×4021432099981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021432009981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010716049990 + 2010716049991.

It is an arithmetic number, because the mean of its divisors is an integer number (2010716049991).

Almost surely, 2^{4021432099981} is an apocalyptic number.

It is an amenable number.

4021432099981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021432099981 is an equidigital number, since it uses as much as digits as its factorization.

4021432099981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 4021432099981 in words is "four trillion, twenty-one billion, four hundred thirty-two million, ninety-nine thousand, nine hundred eighty-one".