100203212121 has 8 divisors (see below), whose sum is σ = 133632130464. Its totient is φ = 66788217600.

The previous prime is 100203212113. The next prime is 100203212143. The reversal of 100203212121 is 121212302001.

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

It is not a de Polignac number, because 100203212121 - 2³ = 100203212113 is a prime.

It is a super-2 number, since 2×100203212121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 100203212121.

It is not an unprimeable number, because it can be changed into a prime (100203232121) 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, 3464151 + ... + 3492956.

It is an arithmetic number, because the mean of its divisors is an integer number (16704016308).

Almost surely, 2^100203212121 is an apocalyptic number.

It is an amenable number.

100203212121 is a deficient number, since it is larger than the sum of its proper divisors (33428918343).

100203212121 is an equidigital number, since it uses as much as digits as its factorization.

100203212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961911.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 100203212121 its reverse (121212302001), we get a palindrome (221415514122).

The spelling of 100203212121 in words is "one hundred billion, two hundred three million, two hundred twelve thousand, one hundred twenty-one".