1221112200311 has 2 divisors, whose sum is σ = 1221112200312. Its totient is φ = 1221112200310.

The previous prime is 1221112200229. The next prime is 1221112200349. The reversal of 1221112200311 is 1130022111221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221112200311 - 2²² = 1221108006007 is a prime.

It is a super-2 number, since 2×1221112200311² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221112200311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221112200811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610556100155 + 610556100156.

It is an arithmetic number, because the mean of its divisors is an integer number (610556100156).

Almost surely, 2^{1221112200311} is an apocalyptic number.

1221112200311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221112200311 is an equidigital number, since it uses as much as digits as its factorization.

1221112200311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1221112200311 its reverse (1130022111221), we get a palindrome (2351134311532).

The spelling of 1221112200311 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred thousand, three hundred eleven".