1201021101100 has 36 divisors (see below), whose sum is σ = 2743385045800. Its totient is φ = 455123784960.

The previous prime is 1201021101079. The next prime is 1201021101101. The reversal of 1201021101100 is 11011201021.

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 (1201021101101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316056285 + ... + 316060084.

Almost surely, 2^{1201021101100} is an apocalyptic number.

1201021101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201021101100 is an abundant number, since it is smaller than the sum of its proper divisors (1542363944700).

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

1201021101100 is a wasteful number, since it uses less digits than its factorization.

1201021101100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632116402 (or 632116395 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1201021101100 its reverse (11011201021), we get a palindrome (1212032302121).

The spelling of 1201021101100 in words is "one trillion, two hundred one billion, twenty-one million, one hundred one thousand, one hundred".