100121002019 has 8 divisors (see below), whose sum is σ = 108596094768. Its totient is φ = 91933200640.

The previous prime is 100121002001. The next prime is 100121002043. The reversal of 100121002019 is 910200121001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100121002019 - 2⁸ = 100121001763 is a prime.

It is a super-2 number, since 2×100121002019² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121001988 and 100121002006.

It is not an unprimeable number, because it can be changed into a prime (100121002049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71822117 + ... + 71823510.

It is an arithmetic number, because the mean of its divisors is an integer number (13574511846).

Almost surely, 2^100121002019 is an apocalyptic number.

100121002019 is a deficient number, since it is larger than the sum of its proper divisors (8475092749).

100121002019 is a wasteful number, since it uses less digits than its factorization.

100121002019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143645685.

The product of its (nonzero) digits is 36, while the sum is 17.

The spelling of 100121002019 in words is "one hundred billion, one hundred twenty-one million, two thousand, nineteen".