12121001211020 has 24 divisors (see below), whose sum is σ = 27412110431664. Its totient is φ = 4475446600896.

The previous prime is 12121001211017. The next prime is 12121001211047. The reversal of 12121001211020 is 2011210012121.

It is a junction number, because it is equal to n+sod(n) for n = 12121001210986 and 12121001211004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23309617454 + ... + 23309617973.

It is an arithmetic number, because the mean of its divisors is an integer number (1142171267986).

Almost surely, 2^{12121001211020} is an apocalyptic number.

12121001211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121001211020 is an abundant number, since it is smaller than the sum of its proper divisors (15291109220644).

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

12121001211020 is a wasteful number, since it uses less digits than its factorization.

12121001211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46619235449 (or 46619235447 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121001211020 its reverse (2011210012121), we get a palindrome (14132211223141).

The spelling of 12121001211020 in words is "twelve trillion, one hundred twenty-one billion, one million, two hundred eleven thousand, twenty".