1200210001011 has 24 divisors (see below), whose sum is σ = 2049619709280. Its totient is φ = 662184827136.

The previous prime is 1200210001009. The next prime is 1200210001013. The reversal of 1200210001011 is 1101000120021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1200210001009) and next prime (1200210001013).

It is not a de Polignac number, because 1200210001011 - 2¹ = 1200210001009 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200210000984 and 1200210001002.

It is not an unprimeable number, because it can be changed into a prime (1200210001013) 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, 328462870 + ... + 328466523.

It is an arithmetic number, because the mean of its divisors is an integer number (85400821220).

Almost surely, 2^{1200210001011} is an apocalyptic number.

1200210001011 is a deficient number, since it is larger than the sum of its proper divisors (849409708269).

1200210001011 is a wasteful number, since it uses less digits than its factorization.

1200210001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656929435 (or 656929432 counting only the distinct ones).

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

Adding to 1200210001011 its reverse (1101000120021), we get a palindrome (2301210121032).

The spelling of 1200210001011 in words is "one trillion, two hundred billion, two hundred ten million, one thousand, eleven".