1011211120020 has 48 divisors (see below), whose sum is σ = 2997943558848. Its totient is φ = 253794163200.

The previous prime is 1011211119959. The next prime is 1011211120061. The reversal of 1011211120020 is 200211121101.

1011211120020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1011211119978 and 1011211120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495690706 + ... + 495692745.

It is an arithmetic number, because the mean of its divisors is an integer number (62457157476).

Almost surely, 2^{1011211120020} is an apocalyptic number.

1011211120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011211120020 is an abundant number, since it is smaller than the sum of its proper divisors (1986732438828).

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

1011211120020 is a wasteful number, since it uses less digits than its factorization.

1011211120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991383480 (or 991383478 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011211120020 its reverse (200211121101), we get a palindrome (1211422241121).

The spelling of 1011211120020 in words is "one trillion, eleven billion, two hundred eleven million, one hundred twenty thousand, twenty".