1220120101000 has 64 divisors (see below), whose sum is σ = 2855438052480. Its totient is φ = 487987012800.

The previous prime is 1220120100977. The next prime is 1220120101001. The reversal of 1220120101000 is 1010210221.

It is a super-3 number, since 3×1220120101000³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1220120101001) 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, 8394949 + ... + 8539051.

It is an arithmetic number, because the mean of its divisors is an integer number (44616219570).

Almost surely, 2^{1220120101000} is an apocalyptic number.

1220120101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220120101000 is an abundant number, since it is smaller than the sum of its proper divisors (1635317951480).

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

1220120101000 is a wasteful number, since it uses less digits than its factorization.

1220120101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152591 (or 152577 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1220120101000 its reverse (1010210221), we get a palindrome (1221130311221).

The spelling of 1220120101000 in words is "one trillion, two hundred twenty billion, one hundred twenty million, one hundred one thousand".