1211120120020 has 12 divisors (see below), whose sum is σ = 2543352252084. Its totient is φ = 484448048000.

The previous prime is 1211120119987. The next prime is 1211120120053. The reversal of 1211120120020 is 200210211121.

It is an interprime number because it is at equal distance from previous prime (1211120119987) and next prime (1211120120053).

It can be written as a sum of positive squares in 2 ways, for example, as 962506193476 + 248613926544 = 981074^2 + 498612^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30278002981 + ... + 30278003020.

It is an arithmetic number, because the mean of its divisors is an integer number (211946021007).

Almost surely, 2^{1211120120020} is an apocalyptic number.

1211120120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211120120020 is an abundant number, since it is smaller than the sum of its proper divisors (1332232132064).

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

1211120120020 is a wasteful number, since it uses less digits than its factorization.

1211120120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60556006010 (or 60556006008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1211120120020 its reverse (200210211121), we get a palindrome (1411330331141).

The spelling of 1211120120020 in words is "one trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty thousand, twenty".