1211020210001 has 32 divisors (see below), whose sum is σ = 1412640552960. Its totient is φ = 1016784907776.

The previous prime is 1211020209979. The next prime is 1211020210087. The reversal of 1211020210001 is 1000120201121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211020210001 is a prime.

It is a super-2 number, since 2×1211020210001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211020210091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172531070 + ... + 172538088.

It is an arithmetic number, because the mean of its divisors is an integer number (44145017280).

Almost surely, 2^{1211020210001} is an apocalyptic number.

It is an amenable number.

1211020210001 is a deficient number, since it is larger than the sum of its proper divisors (201620342959).

1211020210001 is a wasteful number, since it uses less digits than its factorization.

1211020210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9693.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1211020210001 its reverse (1000120201121), we get a palindrome (2211140411122).

The spelling of 1211020210001 in words is "one trillion, two hundred eleven billion, twenty million, two hundred ten thousand, one".