20101226 has 4 divisors (see below), whose sum is σ = 30151842. Its totient is φ = 10050612.

The previous prime is 20101219. The next prime is 20101229. The reversal of 20101226 is 62210102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62210102 = 2 ⋅31105051.

It can be written as a sum of positive squares in only one way, i.e., 13315201 + 6786025 = 3649^2 + 2605^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20101226.

It is not an unprimeable number, because it can be changed into a prime (20101229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025305 + ... + 5025308.

Almost surely, 2^20101226 is an apocalyptic number.

20101226 is a deficient number, since it is larger than the sum of its proper divisors (10050616).

20101226 is a wasteful number, since it uses less digits than its factorization.

20101226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050615.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20101226 is about 4483.4390817764. The cubic root of 20101226 is about 271.8989406143.

Adding to 20101226 its reverse (62210102), we get a palindrome (82311328).

The spelling of 20101226 in words is "twenty million, one hundred one thousand, two hundred twenty-six".