20101221110099 has 4 divisors (see below), whose sum is σ = 20103210749136. Its totient is φ = 20099231471064.

The previous prime is 20101221110071. The next prime is 20101221110101. The reversal of 20101221110099 is 99001112210102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20101221110099 - 2¹² = 20101221106003 is a prime.

It is a super-3 number, since 3×20101221110099³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101221160099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994804364 + ... + 994824569.

It is an arithmetic number, because the mean of its divisors is an integer number (5025802687284).

Almost surely, 2^{20101221110099} is an apocalyptic number.

20101221110099 is a deficient number, since it is larger than the sum of its proper divisors (1989639037).

20101221110099 is a wasteful number, since it uses less digits than its factorization.

20101221110099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989639036.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 20101221110099 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, one hundred ten thousand, ninety-nine".