1220222212011 has 36 divisors (see below), whose sum is σ = 1989701497056. Its totient is φ = 719541329760.

The previous prime is 1220222211983. The next prime is 1220222212021. The reversal of 1220222212011 is 1102122220221.

It is a happy number.

1220222212011 is a `hidden beast` number, since 1 + 220 + 22 + 221 + 201 + 1 = 666.

It is not a de Polignac number, because 1220222212011 - 2⁵ = 1220222211979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220222212021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15101571 + ... + 15182156.

Almost surely, 2^{1220222212011} is an apocalyptic number.

1220222212011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220222212011 is a deficient number, since it is larger than the sum of its proper divisors (769479285045).

1220222212011 is a wasteful number, since it uses less digits than its factorization.

1220222212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30283792 (or 30283778 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1220222212011 its reverse (1102122220221), we get a palindrome (2322344432232).

The spelling of 1220222212011 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twelve thousand, eleven".