212020303091 has 2 divisors, whose sum is σ = 212020303092. Its totient is φ = 212020303090.

The previous prime is 212020303087. The next prime is 212020303097. The reversal of 212020303091 is 190303020212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212020303091 - 2² = 212020303087 is a prime.

It is not a weakly prime, because it can be changed into another prime (212020303097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010151545 + 106010151546.

It is an arithmetic number, because the mean of its divisors is an integer number (106010151546).

Almost surely, 2^212020303091 is an apocalyptic number.

212020303091 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020303091 is an equidigital number, since it uses as much as digits as its factorization.

212020303091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 212020303091 in words is "two hundred twelve billion, twenty million, three hundred three thousand, ninety-one".