121111030100 has 18 divisors (see below), whose sum is σ = 262810935534. Its totient is φ = 48444412000.

The previous prime is 121111030039. The next prime is 121111030127. The reversal of 121111030100 is 1030111121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 175403536 + 120935626564 = 13244^2 + 347758^2 .

It is a super-2 number, since 2×121111030100² (a number of 23 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 in 5 ways as a sum of consecutive naturals, for example, 605555051 + ... + 605555250.

Almost surely, 2^121111030100 is an apocalyptic number.

121111030100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111030100 is an abundant number, since it is smaller than the sum of its proper divisors (141699905434).

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

121111030100 is a wasteful number, since it uses less digits than its factorization.

121111030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211110315 (or 1211110308 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 121111030100 its reverse (1030111121), we get a palindrome (122141141221).

The spelling of 121111030100 in words is "one hundred twenty-one billion, one hundred eleven million, thirty thousand, one hundred".