121201220021122 has 4 divisors (see below), whose sum is σ = 181801830031686. Its totient is φ = 60600610010560.

The previous prime is 121201220021111. The next prime is 121201220021137. The reversal of 121201220021122 is 221120022102121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 112276296794601 + 8924923226521 = 10596051^2 + 2987461^2 .

It is a super-2 number, since 2×121201220021122² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121201220021122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30300305005279 + ... + 30300305005282.

Almost surely, 2^{121201220021122} is an apocalyptic number.

121201220021122 is a deficient number, since it is larger than the sum of its proper divisors (60600610010564).

121201220021122 is an equidigital number, since it uses as much as digits as its factorization.

121201220021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60600610010563.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121201220021122 its reverse (221120022102121), we get a palindrome (342321242123243).

The spelling of 121201220021122 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty million, twenty-one thousand, one hundred twenty-two".