990212201101 has 2 divisors, whose sum is σ = 990212201102. Its totient is φ = 990212201100.

The previous prime is 990212201071. The next prime is 990212201119. The reversal of 990212201101 is 101102212099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 951707558025 + 38504643076 = 975555^2 + 196226^2 .

It is a cyclic number.

It is not a de Polignac number, because 990212201101 - 2⁷ = 990212200973 is a prime.

It is a super-2 number, since 2×990212201101² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 990212201101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990212201161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495106100550 + 495106100551.

It is an arithmetic number, because the mean of its divisors is an integer number (495106100551).

Almost surely, 2^990212201101 is an apocalyptic number.

It is an amenable number.

990212201101 is a deficient number, since it is larger than the sum of its proper divisors (1).

990212201101 is an equidigital number, since it uses as much as digits as its factorization.

990212201101 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 28.

The spelling of 990212201101 in words is "nine hundred ninety billion, two hundred twelve million, two hundred one thousand, one hundred one".