1020012221121 has 4 divisors (see below), whose sum is σ = 1360016294832. Its totient is φ = 680008147412.

The previous prime is 1020012221089. The next prime is 1020012221183. The reversal of 1020012221121 is 1211222100201.

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 1020012221121 - 2⁵ = 1020012221089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020012221121.

It is not an unprimeable number, because it can be changed into a prime (1020012221021) 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, 170002036851 + ... + 170002036856.

It is an arithmetic number, because the mean of its divisors is an integer number (340004073708).

Almost surely, 2^{1020012221121} is an apocalyptic number.

It is an amenable number.

1020012221121 is a deficient number, since it is larger than the sum of its proper divisors (340004073711).

1020012221121 is an equidigital number, since it uses as much as digits as its factorization.

1020012221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340004073710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1020012221121 its reverse (1211222100201), we get a palindrome (2231234321322).

The spelling of 1020012221121 in words is "one trillion, twenty billion, twelve million, two hundred twenty-one thousand, one hundred twenty-one".