211220131122 has 96 divisors (see below), whose sum is σ = 614458615680. Its totient is φ = 50642184960.

The previous prime is 211220131117. The next prime is 211220131159. The reversal of 211220131122 is 221131022112.

It is a super-2 number, since 2×211220131122² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211220131095 and 211220131104.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5843347 + ... + 5879382.

It is an arithmetic number, because the mean of its divisors is an integer number (6400610580).

Almost surely, 2^211220131122 is an apocalyptic number.

211220131122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211220131122 is an abundant number, since it is smaller than the sum of its proper divisors (403238484558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211220131122 is a wasteful number, since it uses less digits than its factorization.

211220131122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11722768 (or 11722765 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 211220131122 its reverse (221131022112), we get a palindrome (432351153234).

The spelling of 211220131122 in words is "two hundred eleven billion, two hundred twenty million, one hundred thirty-one thousand, one hundred twenty-two".