42011321986 has 4 divisors (see below), whose sum is σ = 63016982982. Its totient is φ = 21005660992.

The previous prime is 42011321977. The next prime is 42011321993. The reversal of 42011321986 is 68912311024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42010651225 + 670761 = 204965^2 + 819^2 .

It is a super-2 number, since 2×42011321986² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10502830495 + ... + 10502830498.

Almost surely, 2^42011321986 is an apocalyptic number.

42011321986 is a deficient number, since it is larger than the sum of its proper divisors (21005660996).

42011321986 is a wasteful number, since it uses less digits than its factorization.

42011321986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21005660995.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 42011321986 in words is "forty-two billion, eleven million, three hundred twenty-one thousand, nine hundred eighty-six".