211220212212122 has 4 divisors (see below), whose sum is σ = 316830318318186. Its totient is φ = 105610106106060.

The previous prime is 211220212212083. The next prime is 211220212212169. The reversal of 211220212212122 is 221212212022112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 127769813067961 + 83450399144161 = 11303531^2 + 9135119^2 .

It is a super-2 number, since 2×211220212212122² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52805053053029 + ... + 52805053053032.

Almost surely, 2^{211220212212122} is an apocalyptic number.

211220212212122 is a deficient number, since it is larger than the sum of its proper divisors (105610106106064).

211220212212122 is a wasteful number, since it uses less digits than its factorization.

211220212212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105610106106063.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211220212212122 its reverse (221212212022112), we get a palindrome (432432424234234).

The spelling of 211220212212122 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-two".