211101021097 has 8 divisors (see below), whose sum is σ = 214673972040. Its totient is φ = 207531692160.

The previous prime is 211101021029. The next prime is 211101021133. The reversal of 211101021097 is 790120101112.

It can be written as a sum of positive squares in 4 ways, for example, as 85663923856 + 125437097241 = 292684^2 + 354171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211101021097 - 2³¹ = 208953537449 is a prime.

It is a super-2 number, since 2×211101021097² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211101081097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787822 + ... + 1021207.

It is an arithmetic number, because the mean of its divisors is an integer number (26834246505).

Almost surely, 2^211101021097 is an apocalyptic number.

It is an amenable number.

211101021097 is a deficient number, since it is larger than the sum of its proper divisors (3572950943).

211101021097 is a wasteful number, since it uses less digits than its factorization.

211101021097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811003.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 211101021097 in words is "two hundred eleven billion, one hundred one million, twenty-one thousand, ninety-seven".