1222021210987 has 2 divisors, whose sum is σ = 1222021210988. Its totient is φ = 1222021210986.

The previous prime is 1222021210961. The next prime is 1222021211041. The reversal of 1222021210987 is 7890121202221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222021210987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222021210937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611010605493 + 611010605494.

It is an arithmetic number, because the mean of its divisors is an integer number (611010605494).

Almost surely, 2^{1222021210987} is an apocalyptic number.

1222021210987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222021210987 is an equidigital number, since it uses as much as digits as its factorization.

1222021210987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 1222021210987 in words is "one trillion, two hundred twenty-two billion, twenty-one million, two hundred ten thousand, nine hundred eighty-seven".