1212211220023 has 16 divisors (see below), whose sum is σ = 1234016556192. Its totient is φ = 1190548800000.

The previous prime is 1212211219981. The next prime is 1212211220029. The reversal of 1212211220023 is 3200221122121.

It is a cyclic number.

It is not a de Polignac number, because 1212211220023 - 2⁹ = 1212211219511 is a prime.

It is a super-2 number, since 2×1212211220023² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211220029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139635243 + ... + 139643923.

It is an arithmetic number, because the mean of its divisors is an integer number (77126034762).

Almost surely, 2^{1212211220023} is an apocalyptic number.

1212211220023 is a deficient number, since it is larger than the sum of its proper divisors (21805336169).

1212211220023 is an equidigital number, since it uses as much as digits as its factorization.

1212211220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16626.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1212211220023 its reverse (3200221122121), we get a palindrome (4412432342144).

The spelling of 1212211220023 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty thousand, twenty-three".