1011111122020 has 48 divisors (see below), whose sum is σ = 2213707890240. Its totient is φ = 387585184896.

The previous prime is 1011111121981. The next prime is 1011111122027. The reversal of 1011111122020 is 202211111101.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1011111122027) 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, 11046030 + ... + 11137189.

It is an arithmetic number, because the mean of its divisors is an integer number (46118914380).

Almost surely, 2^{1011111122020} is an apocalyptic number.

1011111122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011111122020 is an abundant number, since it is smaller than the sum of its proper divisors (1202596768220).

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

1011111122020 is a wasteful number, since it uses less digits than its factorization.

1011111122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183324 (or 22183322 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1011111122020 its reverse (202211111101), we get a palindrome (1213322233121).

The spelling of 1011111122020 in words is "one trillion, eleven billion, one hundred eleven million, one hundred twenty-two thousand, twenty".