20121001202211 has 128 divisors (see below), whose sum is σ = 34106028687360. Its totient is φ = 10267325849088.

The previous prime is 20121001202191. The next prime is 20121001202233. The reversal of 20121001202211 is 11220210012102.

It is not a de Polignac number, because 20121001202211 - 2⁹ = 20121001201699 is a prime.

It is a super-2 number, since 2×20121001202211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121001602211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1648850836 + ... + 1648863038.

It is an arithmetic number, because the mean of its divisors is an integer number (266453349120).

Almost surely, 2^{20121001202211} is an apocalyptic number.

20121001202211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20121001202211 is a deficient number, since it is larger than the sum of its proper divisors (13985027485149).

20121001202211 is a wasteful number, since it uses less digits than its factorization.

20121001202211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13185.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121001202211 its reverse (11220210012102), we get a palindrome (31341211214313).

The spelling of 20121001202211 in words is "twenty trillion, one hundred twenty-one billion, one million, two hundred two thousand, two hundred eleven".