1012222201021 has 4 divisors (see below), whose sum is σ = 1071764683452. Its totient is φ = 952679718592.

The previous prime is 1012222200991. The next prime is 1012222201033. The reversal of 1012222201021 is 1201022222101.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 336151805796 + 676070395225 = 579786^2 + 822235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012222201021 - 2⁵ = 1012222200989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012222200986 and 1012222201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012222261021) 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, 29771241190 + ... + 29771241223.

It is an arithmetic number, because the mean of its divisors is an integer number (267941170863).

Almost surely, 2^{1012222201021} is an apocalyptic number.

It is an amenable number.

1012222201021 is a deficient number, since it is larger than the sum of its proper divisors (59542482431).

1012222201021 is an equidigital number, since it uses as much as digits as its factorization.

1012222201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59542482430.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1012222201021 its reverse (1201022222101), we get a palindrome (2213244423122).

The spelling of 1012222201021 in words is "one trillion, twelve billion, two hundred twenty-two million, two hundred one thousand, twenty-one".