121211120001220 has 24 divisors (see below), whose sum is σ = 254545956705600. Its totient is φ = 48483951866592.

The previous prime is 121211120001203. The next prime is 121211120001229. The reversal of 121211120001220 is 22100021112121.

It is a super-2 number, since 2×121211120001220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121211120001194 and 121211120001203.

It is not an unprimeable number, because it can be changed into a prime (121211120001229) 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, 29001850 + ... + 32917009.

It is an arithmetic number, because the mean of its divisors is an integer number (10606081529400).

Almost surely, 2^{121211120001220} is an apocalyptic number.

121211120001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121211120001220 is an abundant number, since it is smaller than the sum of its proper divisors (133334836704380).

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

121211120001220 is a wasteful number, since it uses less digits than its factorization.

121211120001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62016747 (or 62016745 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121211120001220 its reverse (22100021112121), we get a palindrome (143311141113341).

The spelling of 121211120001220 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred twenty million, one thousand, two hundred twenty".