1211201212122 has 24 divisors (see below), whose sum is σ = 2862839229120. Its totient is φ = 367030670280.

The previous prime is 1211201212103. The next prime is 1211201212153. The reversal of 1211201212122 is 2212121021121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1211201212095 and 1211201212104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3058588722 + ... + 3058589117.

It is an arithmetic number, because the mean of its divisors is an integer number (119284967880).

Almost surely, 2^{1211201212122} is an apocalyptic number.

1211201212122 is an abundant number, since it is smaller than the sum of its proper divisors (1651638016998).

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

1211201212122 is a wasteful number, since it uses less digits than its factorization.

1211201212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117177858 (or 6117177855 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211201212122 its reverse (2212121021121), we get a palindrome (3423322233243).

The spelling of 1211201212122 in words is "one trillion, two hundred eleven billion, two hundred one million, two hundred twelve thousand, one hundred twenty-two".