1200222220021 has 12 divisors (see below), whose sum is σ = 1319393809132. Its totient is φ = 1090994256000.

The previous prime is 1200222220007. The next prime is 1200222220073.

1200222220021 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 116205992100 + 1084016227921 = 340890^2 + 1041161^2 .

It is not a de Polignac number, because 1200222220021 - 2⁹ = 1200222219509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200222219977 and 1200222220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200222229021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 613501 + ... + 1666381.

Almost surely, 2^{1200222220021} is an apocalyptic number.

1200222220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200222220021 is a deficient number, since it is larger than the sum of its proper divisors (119171589111).

1200222220021 is a wasteful number, since it uses less digits than its factorization.

1200222220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062324 (or 1062313 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The spelling of 1200222220021 in words is "one trillion, two hundred billion, two hundred twenty-two million, two hundred twenty thousand, twenty-one".