121212001011100 has 36 divisors (see below), whose sum is σ = 263031396960024. Its totient is φ = 48484550678080.

The previous prime is 121212001011097. The next prime is 121212001011107. The reversal of 121212001011100 is 1110100212121.

It is a happy number.

It is a super-2 number, since 2×121212001011100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212001011107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17038419 + ... + 23080981.

It is an arithmetic number, because the mean of its divisors is an integer number (7306427693334).

Almost surely, 2^{121212001011100} is an apocalyptic number.

121212001011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212001011100 is an abundant number, since it is smaller than the sum of its proper divisors (141819395948924).

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

121212001011100 is a wasteful number, since it uses less digits than its factorization.

121212001011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6243174 (or 6243167 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121212001011100 its reverse (1110100212121), we get a palindrome (122322101223221).

The spelling of 121212001011100 in words is "one hundred twenty-one trillion, two hundred twelve billion, one million, eleven thousand, one hundred".