211120121969 has 2 divisors, whose sum is σ = 211120121970. Its totient is φ = 211120121968.

The previous prime is 211120121963. The next prime is 211120121981. The reversal of 211120121969 is 969121021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152174109025 + 58946012944 = 390095^2 + 242788^2 .

It is a cyclic number.

It is not a de Polignac number, because 211120121969 - 2²⁰ = 211119073393 is a prime.

It is a super-2 number, since 2×211120121969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211120121963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560060984 + 105560060985.

It is an arithmetic number, because the mean of its divisors is an integer number (105560060985).

Almost surely, 2^211120121969 is an apocalyptic number.

It is an amenable number.

211120121969 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120121969 is an equidigital number, since it uses as much as digits as its factorization.

211120121969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 211120121969 in words is "two hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, nine hundred sixty-nine".