2211011121020 has 48 divisors (see below), whose sum is σ = 5001069204768. Its totient is φ = 816245579520.

The previous prime is 2211011120987. The next prime is 2211011121029. The reversal of 2211011121020 is 201211101122.

It is a junction number, because it is equal to n+sod(n) for n = 2211011120986 and 2211011121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211011121029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1007267 + ... + 2331653.

It is an arithmetic number, because the mean of its divisors is an integer number (104188941766).

Almost surely, 2^{2211011121020} is an apocalyptic number.

2211011121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211011121020 is an abundant number, since it is smaller than the sum of its proper divisors (2790058083748).

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

2211011121020 is a wasteful number, since it uses less digits than its factorization.

2211011121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330830 (or 1330828 counting only the distinct ones).

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

Adding to 2211011121020 its reverse (201211101122), we get a palindrome (2412222222142).

The spelling of 2211011121020 in words is "two trillion, two hundred eleven billion, eleven million, one hundred twenty-one thousand, twenty".