1211122020220 has 96 divisors (see below), whose sum is σ = 3056954277888. Its totient is φ = 394060246272.

The previous prime is 1211122020181. The next prime is 1211122020247. The reversal of 1211122020220 is 220202211121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211122020194 and 1211122020203.

It is a congruent number.

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, 1071867 + ... + 1889746.

It is an arithmetic number, because the mean of its divisors is an integer number (31843273728).

Almost surely, 2^{1211122020220} is an apocalyptic number.

1211122020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211122020220 is an abundant number, since it is smaller than the sum of its proper divisors (1845832257668).

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

1211122020220 is a wasteful number, since it uses less digits than its factorization.

1211122020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961779 (or 2961777 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211122020220 its reverse (220202211121), we get a palindrome (1431324231341).

The spelling of 1211122020220 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, twenty thousand, two hundred twenty".