1011211102220 has 96 divisors (see below), whose sum is σ = 2374510324032. Its totient is φ = 358530560000.

The previous prime is 1011211102219. The next prime is 1011211102249. The reversal of 1011211102220 is 222011121101.

It is a junction number, because it is equal to n+sod(n) for n = 1011211102195 and 1011211102204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15490850 + ... + 15555990.

It is an arithmetic number, because the mean of its divisors is an integer number (24734482542).

Almost surely, 2^{1011211102220} is an apocalyptic number.

1011211102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011211102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187255162016).

1011211102220 is an abundant number, since it is smaller than the sum of its proper divisors (1363299221812).

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

1011211102220 is a wasteful number, since it uses less digits than its factorization.

1011211102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66923 (or 66921 counting only the distinct ones).

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

Adding to 1011211102220 its reverse (222011121101), we get a palindrome (1233222223321).

The spelling of 1011211102220 in words is "one trillion, eleven billion, two hundred eleven million, one hundred two thousand, two hundred twenty".