1022111221951 has 2 divisors, whose sum is σ = 1022111221952. Its totient is φ = 1022111221950.

The previous prime is 1022111221939. The next prime is 1022111222039. The reversal of 1022111221951 is 1591221112201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022111221951 is a prime.

It is a super-2 number, since 2×1022111221951² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022111225951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511055610975 + 511055610976.

It is an arithmetic number, because the mean of its divisors is an integer number (511055610976).

Almost surely, 2^{1022111221951} is an apocalyptic number.

1022111221951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022111221951 is an equidigital number, since it uses as much as digits as its factorization.

1022111221951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 28.

The spelling of 1022111221951 in words is "one trillion, twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred fifty-one".