1211001112220 has 24 divisors (see below), whose sum is σ = 2586205767600. Its totient is φ = 476190267392.

The previous prime is 1211001112201. The next prime is 1211001112259. The reversal of 1211001112220 is 222111001121.

It is a junction number, because it is equal to n+sod(n) for n = 1211001112195 and 1211001112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513134885 + ... + 513137244.

It is an arithmetic number, because the mean of its divisors is an integer number (107758573650).

Almost surely, 2^{1211001112220} is an apocalyptic number.

1211001112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211001112220 is an abundant number, since it is smaller than the sum of its proper divisors (1375204655380).

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

1211001112220 is a wasteful number, since it uses less digits than its factorization.

1211001112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026272197 (or 1026272195 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211001112220 its reverse (222111001121), we get a palindrome (1433112113341).

The spelling of 1211001112220 in words is "one trillion, two hundred eleven billion, one million, one hundred twelve thousand, two hundred twenty".