1012122121121 has 4 divisors (see below), whose sum is σ = 1035659844912. Its totient is φ = 988584397332.

The previous prime is 1012122121093. The next prime is 1012122121147. The reversal of 1012122121121 is 1211212212101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012122121121 - 2⁶ = 1012122121057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012122121121.

It is not an unprimeable number, because it can be changed into a prime (1012122121321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11768861831 + ... + 11768861916.

It is an arithmetic number, because the mean of its divisors is an integer number (258914961228).

Almost surely, 2^{1012122121121} is an apocalyptic number.

It is an amenable number.

1012122121121 is a deficient number, since it is larger than the sum of its proper divisors (23537723791).

1012122121121 is an equidigital number, since it uses as much as digits as its factorization.

1012122121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23537723790.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1012122121121 its reverse (1211212212101), we get a palindrome (2223334333222).

The spelling of 1012122121121 in words is "one trillion, twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".