212020101997 has 16 divisors (see below), whose sum is σ = 235186554240. Its totient is φ = 189504993600.

The previous prime is 212020101973. The next prime is 212020102001. The reversal of 212020101997 is 799101020212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212020101997 - 2⁷ = 212020101869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020101907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1536888 + ... + 1669150.

It is an arithmetic number, because the mean of its divisors is an integer number (14699159640).

Almost surely, 2^212020101997 is an apocalyptic number.

It is an amenable number.

212020101997 is a deficient number, since it is larger than the sum of its proper divisors (23166452243).

212020101997 is a wasteful number, since it uses less digits than its factorization.

212020101997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134724.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 212020101997 in words is "two hundred twelve billion, twenty million, one hundred one thousand, nine hundred ninety-seven".