100001211020 has 48 divisors (see below), whose sum is σ = 222847269120. Its totient is φ = 37612825536.

The previous prime is 100001211017. The next prime is 100001211041. The reversal of 100001211020 is 20112100001.

It is a junction number, because it is equal to n+sod(n) for n = 100001210989 and 100001211007.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1815182 + ... + 1869461.

It is an arithmetic number, because the mean of its divisors is an integer number (4642651440).

Almost surely, 2^100001211020 is an apocalyptic number.

100001211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001211020 is an abundant number, since it is smaller than the sum of its proper divisors (122846058100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100001211020 is a wasteful number, since it uses less digits than its factorization.

100001211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684734 (or 3684732 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 100001211020 its reverse (20112100001), we get a palindrome (120113311021).

The spelling of 100001211020 in words is "one hundred billion, one million, two hundred eleven thousand, twenty".