1211003023020 has 96 divisors (see below), whose sum is σ = 3893575881216. Its totient is φ = 275488819200.

The previous prime is 1211003023001. The next prime is 1211003023033. The reversal of 1211003023020 is 203203001121.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 6743941 + ... + 6921180.

It is an arithmetic number, because the mean of its divisors is an integer number (40558082096).

Almost surely, 2^{1211003023020} is an apocalyptic number.

1211003023020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211003023020 is an abundant number, since it is smaller than the sum of its proper divisors (2682572858196).

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

1211003023020 is a wasteful number, since it uses less digits than its factorization.

1211003023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13665351 (or 13665349 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1211003023020 its reverse (203203001121), we get a palindrome (1414206024141).

The spelling of 1211003023020 in words is "one trillion, two hundred eleven billion, three million, twenty-three thousand, twenty".