121111000021100 has 72 divisors (see below), whose sum is σ = 263090943081120. Its totient is φ = 48392779806720.

The previous prime is 121111000021079. The next prime is 121111000021111. The reversal of 121111000021100 is 1120000111121.

It is a super-2 number, since 2×121111000021100² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2274828281 + ... + 2274881519.

Almost surely, 2^{121111000021100} is an apocalyptic number.

121111000021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111000021100 is an abundant number, since it is smaller than the sum of its proper divisors (141979943060020).

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

121111000021100 is a wasteful number, since it uses less digits than its factorization.

121111000021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77067 (or 77060 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121111000021100 its reverse (1120000111121), we get a palindrome (122231000132221).

The spelling of 121111000021100 in words is "one hundred twenty-one trillion, one hundred eleven billion, twenty-one thousand, one hundred".