20110122220949 has 2 divisors, whose sum is σ = 20110122220950. Its totient is φ = 20110122220948.

The previous prime is 20110122220931. The next prime is 20110122221003. The reversal of 20110122220949 is 94902222101102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11054494528900 + 9055627692049 = 3324830^2 + 3009257^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110122220949 - 2¹⁶ = 20110122155413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110122220049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055061110474 + 10055061110475.

It is an arithmetic number, because the mean of its divisors is an integer number (10055061110475).

Almost surely, 2^{20110122220949} is an apocalyptic number.

It is an amenable number.

20110122220949 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110122220949 is an equidigital number, since it uses as much as digits as its factorization.

20110122220949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 20110122220949 in words is "twenty trillion, one hundred ten billion, one hundred twenty-two million, two hundred twenty thousand, nine hundred forty-nine".