1200012201989 has 2 divisors, whose sum is σ = 1200012201990. Its totient is φ = 1200012201988.

The previous prime is 1200012201977. The next prime is 1200012202001. The reversal of 1200012201989 is 9891022100021.

It is a balanced prime because it is at equal distance from previous prime (1200012201977) and next prime (1200012202001).

It can be written as a sum of positive squares in only one way, i.e., 1054386009889 + 145626192100 = 1026833^2 + 381610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200012201989 - 2²⁴ = 1199995424773 is a prime.

It is a super-2 number, since 2×1200012201989² (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 (1200012201959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600006100994 + 600006100995.

It is an arithmetic number, because the mean of its divisors is an integer number (600006100995).

Almost surely, 2^{1200012201989} is an apocalyptic number.

It is an amenable number.

1200012201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200012201989 is an equidigital number, since it uses as much as digits as its factorization.

1200012201989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 1200012201989 in words is "one trillion, two hundred billion, twelve million, two hundred one thousand, nine hundred eighty-nine".