20010212149 has 2 divisors, whose sum is σ = 20010212150. Its totient is φ = 20010212148.

The previous prime is 20010212147. The next prime is 20010212293. The reversal of 20010212149 is 94121201002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19472807025 + 537405124 = 139545^2 + 23182^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010212149 - 2¹ = 20010212147 is a prime.

Together with 20010212147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010212147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005106074 + 10005106075.

It is an arithmetic number, because the mean of its divisors is an integer number (10005106075).

Almost surely, 2^20010212149 is an apocalyptic number.

It is an amenable number.

20010212149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010212149 is an equidigital number, since it uses as much as digits as its factorization.

20010212149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 20010212149 in words is "twenty billion, ten million, two hundred twelve thousand, one hundred forty-nine".