211010497921 has 2 divisors, whose sum is σ = 211010497922. Its totient is φ = 211010497920.

The previous prime is 211010497913. The next prime is 211010497931. The reversal of 211010497921 is 129794010112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195509002896 + 15501495025 = 442164^2 + 124505^2 .

It is a cyclic number.

It is not a de Polignac number, because 211010497921 - 2³ = 211010497913 is a prime.

It is a super-3 number, since 3×211010497921³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (211010497931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505248960 + 105505248961.

It is an arithmetic number, because the mean of its divisors is an integer number (105505248961).

Almost surely, 2^211010497921 is an apocalyptic number.

It is an amenable number.

211010497921 is a deficient number, since it is larger than the sum of its proper divisors (1).

211010497921 is an equidigital number, since it uses as much as digits as its factorization.

211010497921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 211010497921 in words is "two hundred eleven billion, ten million, four hundred ninety-seven thousand, nine hundred twenty-one".