1220231211000 has 64 divisors (see below), whose sum is σ = 3807121387680. Its totient is φ = 325394988800.

The previous prime is 1220231210981. The next prime is 1220231211127. The reversal of 1220231211000 is 1121320221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203368869 + ... + 203374868.

Almost surely, 2^{1220231211000} is an apocalyptic number.

1220231211000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220231211000 is an abundant number, since it is smaller than the sum of its proper divisors (2586890176680).

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

1220231211000 is a wasteful number, since it uses less digits than its factorization.

1220231211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406743761 (or 406743747 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1220231211000 its reverse (1121320221), we get a palindrome (1221352531221).

The spelling of 1220231211000 in words is "one trillion, two hundred twenty billion, two hundred thirty-one million, two hundred eleven thousand".