40421972102 has 4 divisors (see below), whose sum is σ = 60632958156. Its totient is φ = 20210986050.

The previous prime is 40421972099. The next prime is 40421972111. The reversal of 40421972102 is 20127912404.

It is a happy number.

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

It is a super-2 number, since 2×40421972102² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105493024 + ... + 10105493027.

It is an arithmetic number, because the mean of its divisors is an integer number (15158239539).

Almost surely, 2^40421972102 is an apocalyptic number.

40421972102 is a deficient number, since it is larger than the sum of its proper divisors (20210986054).

40421972102 is a wasteful number, since it uses less digits than its factorization.

40421972102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20210986053.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 40421972102 in words is "forty billion, four hundred twenty-one million, nine hundred seventy-two thousand, one hundred two".