212111100020122 has 4 divisors (see below), whose sum is σ = 318166650030186. Its totient is φ = 106055550010060.

The previous prime is 212111100020101. The next prime is 212111100020123. The reversal of 212111100020122 is 221020001111212.

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., 154153803025161 + 57957296994961 = 12415869^2 + 7612969^2 .

It is a super-2 number, since 2×212111100020122² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212111100020096 and 212111100020105.

It is not an unprimeable number, because it can be changed into a prime (212111100020123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53027775005029 + ... + 53027775005032.

Almost surely, 2^{212111100020122} is an apocalyptic number.

212111100020122 is a deficient number, since it is larger than the sum of its proper divisors (106055550010064).

212111100020122 is a wasteful number, since it uses less digits than its factorization.

212111100020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106055550010063.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212111100020122 its reverse (221020001111212), we get a palindrome (433131101131334).

The spelling of 212111100020122 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred million, twenty thousand, one hundred twenty-two".