1201211102020 has 24 divisors (see below), whose sum is σ = 2528897344344. Its totient is φ = 479274149376.

The previous prime is 1201211102011. The next prime is 1201211102023. The reversal of 1201211102020 is 202011121021.

It can be written as a sum of positive squares in 4 ways, for example, as 284891197504 + 916319904516 = 533752^2 + 957246^2 .

It is a super-2 number, since 2×1201211102020² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201211102023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75635077 + ... + 75650956.

It is an arithmetic number, because the mean of its divisors is an integer number (105370722681).

Almost surely, 2^{1201211102020} is an apocalyptic number.

1201211102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201211102020 is an abundant number, since it is smaller than the sum of its proper divisors (1327686242324).

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

1201211102020 is a wasteful number, since it uses less digits than its factorization.

1201211102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151286439 (or 151286437 counting only the distinct ones).

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

Adding to 1201211102020 its reverse (202011121021), we get a palindrome (1403222223041).

The spelling of 1201211102020 in words is "one trillion, two hundred one billion, two hundred eleven million, one hundred two thousand, twenty".