1201021011000 has 96 divisors (see below), whose sum is σ = 4059451047600. Its totient is φ = 320272267200.

The previous prime is 1201021010941. The next prime is 1201021011007. The reversal of 1201021011000 is 1101201021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201021011007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66714390 + ... + 66732389.

Almost surely, 2^{1201021011000} is an apocalyptic number.

1201021011000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201021011000 is an abundant number, since it is smaller than the sum of its proper divisors (2858430036600).

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

1201021011000 is a wasteful number, since it uses less digits than its factorization.

1201021011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133446806 (or 133446789 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1201021011000 its reverse (1101201021), we get a palindrome (1202122212021).

The spelling of 1201021011000 in words is "one trillion, two hundred one billion, twenty-one million, eleven thousand".