22111222001989 has 2 divisors, whose sum is σ = 22111222001990. Its totient is φ = 22111222001988.

The previous prime is 22111222001963. The next prime is 22111222002029. The reversal of 22111222001989 is 98910022211122.

It is an a-pointer prime, because the next prime (22111222002029) can be obtained adding 22111222001989 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19009512800100 + 3101709201889 = 4359990^2 + 1761167^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111222001989 - 2⁴³ = 13315128979781 is a prime.

It is a super-2 number, since 2×22111222001989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111222001959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055611000994 + 11055611000995.

It is an arithmetic number, because the mean of its divisors is an integer number (11055611000995).

Almost surely, 2^{22111222001989} is an apocalyptic number.

It is an amenable number.

22111222001989 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111222001989 is an equidigital number, since it uses as much as digits as its factorization.

22111222001989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 22111222001989 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, one thousand, nine hundred eighty-nine".