21030121010101 has 8 divisors (see below), whose sum is σ = 24338657227520. Its totient is φ = 17797643096688.

The previous prime is 21030121010099. The next prime is 21030121010189. The reversal of 21030121010101 is 10101012103012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21030121010101 - 2¹ = 21030121010099 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030121011101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19014575406 + ... + 19014576511.

It is an arithmetic number, because the mean of its divisors is an integer number (3042332153440).

Almost surely, 2^{21030121010101} is an apocalyptic number.

It is an amenable number.

21030121010101 is a deficient number, since it is larger than the sum of its proper divisors (3308536217419).

21030121010101 is an equidigital number, since it uses as much as digits as its factorization.

21030121010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38029152003.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21030121010101 its reverse (10101012103012), we get a palindrome (31131133113113).

It can be divided in two parts, 2103012 and 1010101, that multiplied together give a palindrome (2124254524212).

The spelling of 21030121010101 in words is "twenty-one trillion, thirty billion, one hundred twenty-one million, ten thousand, one hundred one".