1201222022121 has 32 divisors (see below), whose sum is σ = 1941925440000. Its totient is φ = 727804653840.

The previous prime is 1201222022107. The next prime is 1201222022153. The reversal of 1201222022121 is 1212202221021.

It is a happy number.

1201222022121 is a `hidden beast` number, since 1 + 201 + 2 + 220 + 221 + 21 = 666.

It is not a de Polignac number, because 1201222022121 - 2⁶ = 1201222022057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201222022094 and 1201222022103.

It is not an unprimeable number, because it can be changed into a prime (1201222022171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 461250 + ... + 1617156.

It is an arithmetic number, because the mean of its divisors is an integer number (60685170000).

Almost surely, 2^{1201222022121} is an apocalyptic number.

1201222022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201222022121 is a deficient number, since it is larger than the sum of its proper divisors (740703417879).

1201222022121 is a wasteful number, since it uses less digits than its factorization.

1201222022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159426 (or 1159420 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1201222022121 its reverse (1212202221021), we get a palindrome (2413424243142).

The spelling of 1201222022121 in words is "one trillion, two hundred one billion, two hundred twenty-two million, twenty-two thousand, one hundred twenty-one".