100021221004 has 6 divisors (see below), whose sum is σ = 175037136764. Its totient is φ = 50010610500.

The previous prime is 100021220983. The next prime is 100021221017. The reversal of 100021221004 is 400122120001.

It is a happy number.

It is a super-2 number, since 2×100021221004² (a number of 23 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, 12502652622 + ... + 12502652629.

Almost surely, 2^100021221004 is an apocalyptic number.

It is an amenable number.

100021221004 is a deficient number, since it is larger than the sum of its proper divisors (75015915760).

100021221004 is a wasteful number, since it uses less digits than its factorization.

100021221004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25005305255 (or 25005305253 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100021221004 its reverse (400122120001), we get a palindrome (500143341005).

The spelling of 100021221004 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, four".